Question

If f(x) = xsquared does f(a+1) = (a+1)squared

Answer 1

what's the question?

Answer 2

if f(x) = X squared does it follow that f(a+1) = (a+1) squared

Answer 3

True :D

Answer 4

yes

Answer 5

explain why

Answer 6

replace x with (a+1).

Answer 7

How do you evaluate the expresssion f(g(4)) when f(x)= 3x and g(x)= x-2

Answer 8

f(g(4))=3(4-2)=6

Answer 9

@firebird Do you understand ?

Answer 10

no

Answer 11

So let me explain that to you

We have to find f(g(4)

So we have to find


g(4) first

g(x)=x-2

then

g(4)=

Answer 12

note:
if f(x)=3x, g(x)=x-2,
then f(g(x))=3(g(x))=3(x-2)

Answer 13

f(g(x)) :substitute g(x) in x of f(x).

Answer 14

simply sub anything inside x as long it's in the domain.

Answer 15

@firebird Do you follow me ?

Answer 16

yes

Answer 17

So what did you get ?

g(4)=

Answer 18

4-2=g(x)

Answer 19

So under the same values of f(x) and g(x), g(f(4)) is equal to g(3(x)) which is equal to
x-2(3x)?