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## Homework Statement

What exactly does it mean when the phrase " y as a function of x" mean?

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- Thread starter Miike012
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- #1

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What exactly does it mean when the phrase " y as a function of x" mean?

- #2

symbolipoint

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For an expression to be a function, each value of y can have ONE value for x. No two y values have the same x value.

- #3

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f(x)=2x ( does f(x) mean y as a function of x?)

Then it says

Suppose u is a function of x

How would I re-write the problem?

- #4

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Would I just write it as...

u = 2x?

u = 2x?

- #5

eumyang

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Is "f(x)=2x" and "Suppose u is a function of x" part of the same problem? And what does the rest of the problem say?I have this problem in my book that says...

f(x)=2x

Then it says

Suppose u is a function of x

- #6

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Suppose that u is a function of x and

y = cu

then what we believe is that y' = cu'

Then it asks me to prove that

y' = cu' is correct.

- #7

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Does any one know?

- #8

Borek

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