Consider the functions f(x) = 2x2 + 1 and g(x) = x + 2. What is the value of f[g(3)]?

Question

amistre64 · Answer

whats the value of g(3)?

anonymous · Answer

yes

amistre64 · Answer

yes is not a number.  what is the value of g(3)?

amistre64 · Answer

since:  g(x) = x + 2

what is the value of g(3) ?

anonymous · Answer

i dont know thats why im asking

amistre64 · Answer

the notation means that when x=3, what does the value of the function of g take on?

x+2 = ?  , when x = 3

anonymous · Answer

5 but thats not one of the answers it gives me these choices
101, 51, 21, 11

amistre64 · Answer

we havent gotten to an answer yet, that will be in the last step.  The process to get to that answer is what we are working thru at the moment.

amistre64 · Answer

so we have discovered the g(3) = 5, we can use this to our advantage

f(g(3)) then means f(5)

amistre64 · Answer

f(x) = 2x2 + 1

f(g(3)) = f(5)

f(5) means what is the value of the function of f when its x is equal to 5

 2x2 + 1 = ? when x = 5?

amistre64 · Answer

feel free to ask questions if this doesnt make sense.

anonymous · Answer

51 (:

amistre64 · Answer

51 is good :)

anonymous · Answer

thank you