Question

Two functions, f(x) = 2x2 + 3 and g(x) = x + 1.

If you are asked to find f[g(2)], which function would you solve first?
Select one:
a. f(x)
b. g(x)
c. Either f(x) or g(x)
d. Not enough information given

Answer 1

@sidsiddhartha @swift_13

Answer 2

you solve g(x)

Answer 3

how?

Answer 4

wait so the answer is B

Answer 5

g(2)=3
and than plug 3 into f(x)

Answer 6

is that the rightf(x) = 2x2 + 3 ?

Answer 7

i think you tell me

Answer 8

no i mean is that the right function you typed in? 2x2 (is that a x or multiplication sign?)

Answer 9

its an x

Answer 10

@sidsiddhartha

Answer 11

well than it should be b. g(x)

Answer 12

ok thank you soo much

Answer 13

So we're actually solving it now?

well

\[\large f(x) = 2x^2 + 3\]
\[\large g(x) = x + 1\]

f(g(2)) would mean to solve g(2) first...then lug the output in for 'x' in the 'f' function

so

\[\large g(2) = 2 + 1 = 3\]

Now just plug in 3 for 'x' in the 'f' function

\[\large f(g(2)) = 2(3)^2 + 3 = 2(9) + 3 = 18 + 3 = 21\]

Answer 14

so is the correct answer is B right

Answer 15

..yes