Do you have the phrase "pieces of"?

Do you have the phrase "pieces of"?

Pieces of pieces can be understood as many pieces of bread
A piece of paper
Is a piece of fixed phrase or a piece of advice a phrase
A piece of advice means "a piece of advice"
A piece of is a fixed phrase
Advice doesn't seem to be a word. It's misspelled
Help to prove a problem of periodic function,
It is proved that if the image of function y = f (x) is axisymmetric (a ≠ b) with respect to both line x = A and line x = B, then y = f (x) is a periodic function and 2 | A-B | is a period
What's the rule of verb plus ing?
The changing rules of the verb ing are as follows: x0d1. Direct + ing in general; x0d2. Take taking making making having having; x0drive riding; x0d3. Stress a consonant of a closed syllable
Small problem o (∩) in understanding periodic functions_ ∩)O~
If f (x + T) = ± 1 / F (x), then 2T is a period of F (x)
Why 1 / F (x), I don't think it's right
I don't understand what you're asking
F (x + T) = ± 1 / F (x) is a hypothesis
Because f (x + T) = ± 1 / F (x),
So f ((x + T) + T) = ± 1 / F (x + T) = f (x),
That is, f (x + 2t) = f (x),
So the period is 2T
The law of verb plus ing
In primary school, be more detailed
The English verb plus ing means that the action is in progress, but it must be preceded by the verb be (am is are)
such as
I am eating
After adding ing to a verb, it can't be used as a predicate independently. After adding be, it can be used as a predicate in a sentence. But the verb with ing can be used as an adjective
Small problems of periodic function
Y = SiNx is a periodic function with a period of 2 π, which I know
So if the given function is y = SiNx, X ∈ (0, π), that is to say, a function that can not form a complete period is given, can it still be called a periodic function?
We can't say that x ∈ (0, π) doesn't form a period at all, but a section of X ∈ (0, 4 π) is a periodic function
It's not a periodic function
What verb is followed by the verb ing
The verb ing, also known as gerund, is a verb variant with a nominal part of speech
General be verb followed by gerund, specific verbs such as enjoy followed by gerund
Gerund is also used in the continuous tense past continuous future continuous perfect continuous
How to understand several basic forms of periodic function
If f (x + a) = - f (x), how to understand this? The teacher said that it is to remove an A and add a negative sign?
f(x)=-f(x+a)
Let x = x + A, so x + a = x + 2A
So - f (x + a) = f (x + 2a)
So f (x) = f (x + 2a), the period of this function is 2A
What are the fixed collocations in English with verb plus ing
They are mind, risk, succeed in, practice, understand, be busy, look forward to, admit (allow) consider (can't help), keep on, miss, imagine (intervene on), suggest, stop, enjoy, delay, avoid, be used to, escape, finish, be worth, advise, give up Mrs. Black has lost a beef bag and several go on, learn doing sth, feel like, feel
If you have time, you may as well look up those big dictionaries with many explanations and examples to increase your memory and understand the usage,