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Abagial

Guest

Functions , PLEASE HELP ME ITS DUE TOMMOROW FOR A GRADE !!!!!!

Suppose f(x)= 3x + 7   ,     g(x)= - x + 8      ,   and  h(x) = x2 (squared) + 3x - 1
Evaluate the Following :

1. g(7)
2. f(2) + h(1)
3. f(1)/g(3)
4. f(x+2)

PLEASE HELP ME ,  ITS DUE FOR A GRADE TOMMOROW .. THESE ARE THE ONLY PROBLEMS I DON'T UNDERSTAND !!

Ubergeek

Member

Registered: 2009-07-14

Posts: 205

Re: Functions , PLEASE HELP ME ITS DUE TOMMOROW FOR A GRADE !!!!!!

1. Substitute the x in g(x) for 7, you'll get - 7 + 8, which equals 1.

2. f(2) = 3 (2) + 7 = 13

+

h(1) = 1^2 + 3 (1) - 1 = 3

13 + 3 = 16

You get the idea ^^.

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"Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true."

Bertrand Russell

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Functions , PLEASE HELP ME ITS DUE TOMMOROW FOR A GRADE !!!!!!

Hi Abagial

Suppose f(x)= 3x + 7   ,     g(x)= - x + 8      ,   and  h(x) = x2 (squared) + 3x - 1

3. f(1)/g(3)

4. f(x+2)

Last edited by bobbym (2009-08-07 12:04:47)

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.