The point corresponding to complex number m ^ 2-3 + (2-m-m ^ 2) I on complex plane is in the second quadrant, and the value range of real number m is obtained

m²-30
m²

Function y = Log1 / 2 (cosx + SiNx) (0

Let t = cosx + SiNx = root 2 * sin (x + π / 4)
X + π / 4 = π / 2 x = π / 4 t the maximum is the root sign 2
Y = Log1 / 2 (radical 2) = - log2 (2 ^ 1 / 2) = - 1 / 2

The minimum value of y = Log1 / 2 (SiNx cosx) is? X =?

Deformation is y = Log1 / 2 root sign 2 times (x-45 degrees)
When the minimum value is obtained, sin (x-45 degrees) reaches the maximum value
Then x-45 = 90 + 2K
X = 135 + 2K

How to pronounce vowel + consonant + vowel?
Example: January
Should we read "stick Newry" or "pick Newry"
Is the former pronunciation of "n" and "a" free?
Sorry, it's hard to use these days. I always make a mistake.
The teacher said that the n should be pronounced with the A in front of it. She meant to read "sticky Newry.". (can't print out the phonetic mark, sorry)

The pronunciation is similar to "pick Newry", n does not pronounce with a, pronounces with u, pronounces "new"
(it's good that I can understand your question. You have too many typos.)
The pronunciation upstairs is not standard. It's a typical Chinese pronunciation

Pronunciation of 48 phonemes, 20 vowels and 28 consonants in English
Do you have any tips

Some concepts of phonetics
1) Letter: the written form of language. Vowels a, e, I (y), O, u,
2) Phonetic symbol: the phonetic form of a word
3) Phoneme: the smallest unit of sound. There are 48 phonemes in English
4) Syllable: a unit of speech consisting of vowels and consonants. Ap'ple, stu'dent, tea'cher, un'der'stand
5) Vowels: they are loud and musical; the air flow in the mouth is unobstructed; they are the main sounds of syllables. There are 20 vowels in English
6) Consonants: they are not loud, they are noise; the air flow in the mouth is blocked; they are not the main sounds of syllables. There are 28 consonants in English
7) Open syllable: a) consonant + vowel + consonant + e name bike home due; b) consonant + vowel he, go, hi
8) Closed syllable: a) consonant + vowel + consonant bad, bed, sit, hot, cup; b) vowel + consonant it
9) Stressed syllable: a syllable in a word that sounds especially loud
2. Vowel: (Note: the empty brackets below are phonetic symbols that can't be input by computer)
1) [i:] sea, he, see, piece, ceiling
2) [i] sit, build, miss, myth
3) [e] bed, desk, head,
4) [ ] bad, land, bank, stamp
5) [a:] car, fast, class, plant, calm, aunt
6) [ ] hot, want
7) [ ] door, more, sport, ball, warm, author, court, bought, caught
8) [u:] good, who, blue, soup,
9) [u] look, put, women, could
10) [ ] cup, come, blood, rough
11) [ ] girl, work, serve, nurse
12) [ ] cadre, ago, forget, polite, dollar, doctor, famous, Saturday
13) [ei] cake, they, play, eight, great,
14) [ai] bike, die, neither, light, try, find, height, eye
15) [ ] phone, cold, boat, soul, grow
16) [au] house, town
17) [ ] boy, oil
18) [ ] dear, idea, deer, here, fierce,
19) [ ] pear, care, there, fair
20) [ ] tour, poor,
3. Easily confused vowels
1) [e] [] bed bad; men, man; pen, pan; lend land
2) [i:] [ei] real rail; greet, great; mean, main; read raid
3) [e] [AI] bet bite; red write; said side, head, hide
4) [au] [ ] house horse; loud lord; south sauce; now nor; count corn; cloud clause
5) [au] [ ] found fond; gown gone; down don
4. Consonant
1) [p] pen,
2) [b] bed, comb
3) [t] tell,
4) [d], day, played, wanted
5) [k] cold, sky, quick, school, back, accept, box
6) [g] big, go, guess, language
7) [m] man
8) [n] nine, knife, autumn
9) [ ] bank, uncle, English, sing,
10) [l] land, world
11) [r] read, write,
12) [f] five, cough, laugh
13) [v] voice, of
14) [ ] think,
15) [ ] this, bathe
16) [s] sit, miss, science, case, scarf
17) [z] zoo, close,
18) [ ] sure, she, social, nation
19) [ ] pleasure,
20) [h] hot, who, hour
21) [w] wall, what, answer
22) [j] yes
23) [ ] child, teach, catch
24) [ ] joke, bridge,
25) [ts] boats
26) [dz] goods
27) [tr] tree
28) [dr] dream
5. Easily confused consonants
1) [v] [w] vet wet; vest west; vine wine; very well
2) [s] [ ] sink think; sort thought; miss myth; mass math
3) [z] [ ] closing clothing; breeze breathe; bays bathes
4) [n] [ ] thin thing; sin sing; ban bang win wing; ran rang
6. Pronunciation rules
1) Stress syllables (see examples of vowels and consonants)
2) Unstressed syllables: banana, student, today, after, [i] Orange, secret, evening, very, Monday
7. Special pronunciation
1) Consonants: the first word ends with a metaconsonant, and the last word begins with a vowel. In this way, the ending consonant should be connected with the first vowel. For example: not at all, half an hour, I love you and all. After all
2) Loss of burst: consonant plosive or fricative is followed by plosive, fricative and fricative, and the front consonant will lose burst. For example: good girl, good student, good job, expression, school, extreme
3) Assimilation of sounds: two special sounds meet and produce special sounds. For example: would you do it? I am glad to meet you. Can't you see it? Last year, this year,
8. Stress
1) Word stress
A) Disyllabic words
a) It is stressed in the first syllable
b) A'bout, be'lie, ad'dress, de'cide, re'port, con'demn, res'respect, com'pare, in'form, dis'cus, im'press, mis'take, en'force, pre'pare, em'ploy, per'mit, es'cape, pro'due, ex'claim, translate'late
c) The stress of prefixes such as de -, in -, re -, con -, pre - is related to word meaning and part of speech. The stress of general nouns is on the first syllable, and other parts of speech are on the second syllable.'record, re'cord;'instruction, in'sult;'conduct, con'duct;'present, pre'sent;'content, con'tent '
d) Some compound words and words with prefixes re -, ex -, un -, pre -, post -, etc. have two stresses.'out'side ',' re'tell ',' well -'known ',' un'real ',' fif'teen ',' chi'nese ',' pre -'war ',' post -'war '
B) Polysyllabic words
a) Generally, the last syllable is stress
b) Some disyllabic words are polysyllabic with prefixes and suffixes, but they are pronounced according to the stress of the original root,
c) For words ending with - eous, - grahpy, - ial, - Ian, - IC, - ics, - friend, ENT, - ify, - ion, - ious, - ity, Ive, the stress is on the first syllable of these suffixes. Cour'teous, cal'ligraphy, edi'torial, his'torian, peri'odic, mathematics, ex'perience, suf'specific, i'identify, trans'lation, re'ligious, curi'osity, pro'technical
d) For words with suffix - ain, - EE, - EER, - ese, - ette, the stress is on the suffix, and there is a secondary stress. Enter'tain, emplo'yee, montai'neer, japa'nese, ciga'rete
2) Sentence stress
A) English rhythm: (light) - light - Heavy - light - (light) or heavy - light - (light) (light) heavy
B) The length of English sentences is determined by the number of stressed words, not by the number of Chinese characters
C) Content words stress (adverb stress), function words stress (article, monosyllabic preposition, monosyllabic conjunction, personal pronoun, counter pronoun, possessive pronoun, relative pronoun, reciprocal pronoun, auxiliary verb, modal verb and copula)
D) The special situation of notional words without stress
a) He thinks of that as a child thinks
b) A noun is modified by a second noun
c) Which book do you want? The small one
d) What and how what a good day it is! How beautiful she is!
e) Street in proper nouns: Wangfujing Street
f) In these phrases, this morning / after noon / evening
E) The special situation of function word stress
a) Do you like it? Yes, I do. Are you a doctor? Yes, I am. Can you help me? Yes, I can. I don't like you. He isn't a worker
b) They may come this evening. Can it be five already? He must be in the room
c) In the box, he found a letter. He is the person I talked with
d) If you wish, I'll visit you. When he comes, I'll tell him
e) He could't come himself

Why do consonants meet vowels in English words and read them directly without the same spelling as Chinese
I have been thinking about this problem for a long time and it has become my psychological obstacle. I always think about this problem every day. I can't devote myself to anything else. I always think about this problem,

Don't think about it all the time. It's good to study the problem seriously. But it's not advisable to think about it all the time
Learning is to discover and accept rules. Since English pronunciation has this rule, you can accept it
Do you think so

What is ending with a vowel or a consonant in English words
If you can tell us which are vowels and which are consonants, it's better to give some examples,

It's the pronunciation of the word. The ending sound is a vowel or consonant
For example, fly's ending sound is the vowel AI
The take ending is a K consonant
From phonetic symbols

Vowel + consonant + e with or without pronunciation is an open syllable. What about e with pronunciation?
The vowel + consonant + e with no pronunciation is an open syllable,
What about the e with pronunciation? What syllable is it? Is the vowel pronounced according to the open syllable rule, or according to what pronunciation rule?
What sound do you pronounce? Vowel + consonant + E. in this case, what sound do the front vowels pronounce?

The vowel + consonant + accented e is not an open syllable, but a combination of letters, such as page

The pronunciation of English vowels in words
For example, how to pronounce "I" in "bike"? What are the rules?

The "I" in "so" has the letter "Ai",
Take a hair EI
Home O send ou
.

How to pronounce the double vowel EI? How to pronounce it in a word?
For example: neighbor and dentist
Is it a "love one" or a "interior"?
For example: neighbor and dentist

Well, it's common for people to say, "Hey, don't read the w-ei in front."
Nebergote City
neighbour dentist

The point corresponding to complex number m ^ 2-3 + (2-m-m ^ 2) I on complex plane is in the second quadrant, and the value range of real number m is obtained