Question

given: f(x)= x^3 + 1 and g(x)= sqare root of x. Find.
(A.) f(g(x)) (B.) g(f(x)) (C.) f(x+1) (D.) f(x^2)

Answer 1

f(x)=x^3+1
f(x)=3x^2

Answer 2

(A.) f(g(x))

g into f.

x^3 + 1
\[\Huge \sqrt{x^3}+1\]

Answer 3

@ushef
i dont get that..

Answer 4

silly me this is rlly easy! haha

Answer 5

o.O

Answer 6

are the answers to a and b the same?

Answer 7

no answers are differnent..

Answer 8

You just have to replace x by what's into brackets :
\[e.g. f(g(x))=g(x)^{3}+1=\sqrt{x}^{3}+1=x \sqrt{x}+1\]

Answer 9

\[g(f(x))=\sqrt{f(x)}=\sqrt{x+1}\]...