Given that the function y = TaNx is monotonically increasing in the interval (- A / 3 π, a / 2 π), the value range of a is obtained?

Given that the function y = TaNx is monotonically increasing in the interval (- A / 3 π, a / 2 π), the value range of a is obtained?

Y = TaNx increases in the interval (- π / 2, π / 2)
It is necessary to satisfy the monotonic increasing on the interval (- A / 3 π, a / 2 π)
Then (- A / 3 π, a / 2 π) is contained in (- π / 2, π / 2)
Obviously, a > 0
A / 3 ≥ - 1 / 2 and a / 2 ≤ 1 / 2
A ≤ 3 / 2 and a ≤ 1
That is, a ≤ 1
In conclusion, the value range of a is (0,1]

Given a < 0, it is proved that y = ax + 3 is a decreasing function on (- ∞, + ∞) by definition

It is proved that if x 1, x 2 ∈ R and x 1 ＜ x 2, then y 1-y 2 = ax 1 + 3 - (AX 2 + 3) = a (x 1-x 2); ∵ a ＜ 0, X 1-x 2 ＜ 0; ∵ y 1-y 2 ＞ 0; that is, Y 1 ＞ y 2; ∵ y = ax + 3 is a decreasing function on (- ∞, + ∞)

Write the plural of the following words
1 crane
2 beaks
3 seagulls
4 sparrow
5 Swan
6 gold carving
7 Red Crowned Crane
8 pigeons
9 wetlands
zoo keeper
hectare
worm
flood
centimeter
kilometre
degrees
dollar
form
address

-s
-es

How to draw a ball in oblique two measure drawing
I'm drawing a visual picture of a triangular prism (placed horizontally on the bottom) with a ball superimposed on the top and bottom of it. The triangular prism has already been drawn. How can I draw the ball? Do I still need to draw it so round? (the problem is that the triangle on the bottom is "shrunken" after being tilted 45?)

I tell you, if you take any spherical object, you can see "pure" circle from all angles, and the oblique two side drawing method is to draw three-dimensional graphics intuitively, so the ball should still be round
(however, if you have learned the knowledge of "perspective" in art, you will know that it is wrong to slant two sides. However, we ignore this difference in mathematics.)
(if you ask such a question, I guess you are a girl.)

which___ you rather _____ ,tea or coffee?
Option A. would; like B. would; drink
Would like. If it is would rather, you can also use like

Obviously a
The equivalent sentences are
Which do you prefer?
Which do you like better?
Which do you want to drink?
And so on

Take three points a, B and C on the line L such that ab = 4cm and BC = 3cm. If O is the midpoint of the line AC, find the length of ob
Finally, there are two results of 0.5 and 3.5,

(1) A, B and C are in order on the straight line (that is, a is on the left, B is in the middle, C is on the right) because AB = 4cm, BC = 3cm, so AC = 7cm because o is the midpoint of the line AC, so OC = 3.5cm, so ob = oc-ob = 0.5cm (2) a, B and C are not in order on the straight line (that is, a is on the left, C is in the middle, B is on the right) because AB = 4cm, BC =

English translation
In danger__________ 2. With For food__________ 3 wildlife___________ 4 and Share it together________ Go to a concert__________ In order to Famous_______ Learn to do sth____________ Eight pairs of Satisfied_________ In one's spare time_________ 10 online chat_________ Wake sb up__________ 12 in the 1960s________ Do one's best__________ 14 Together_________

1. in danger 2.live on sth 3.wild animals 4.share with 5.go to concert 6.be famous for 7.learn to do sth. 8.be satisfied with sth. 9.in one's spare time 10.chat on line 11.wake sb. up 12. in the 1960s 13.try one's best 14.conect ...with
Remember to adopt it

The simplest fraction, whose numerator is divided by 2 and denominator multiplied by 3, is reduced to 329. The simplest fraction is______ ．

329 × 2 × 3 = 1829

Is some a countable or uncountable noun?

Some can modify both the plural of countable nouns and uncountable nouns
For example: some milk
some friends
If you don't understand, please take it in time. Thank you!

Given that (a + 2) △ 3 = (c + 5) △ 6 = B △ 4, and 2A + B + 3C = 21, find the values of a, B, C

Let a + 2 / 3 = C + 5 / 6 = B / 4 = K
that
a=3k-2
b=4k
c=6k-5
2a-b+3c
=2（3k-2）-4k+3（6k-5）
=20k-19
=21
So k = 2
a=4 b=8 c=7