Question

If f(x) = x 2 + 1 and g(x) = 3x + 1, find f(-1) + 5g(-3).

Answer 1

If
\[f(x) = x^2 + 1\]
\[f(-1) = (-1)^2 + 1\]
----------------------
\[g(x) = 3x + 1\]
\[g(-3) = 3(-3) + 1\]
================
Then
\[f(-1)+5g(-3)\]
\[=((-1)^2+1)+5(3(-3)+1)\]

Answer 2

i dont get it

Answer 3

If f(x) = x^2 + 1, when x=-1, the function
f(-1) will be equal to \((-1)^2+1\)
Same for g(x),
If g(x) = 3x+1, when x=-3, the function
g(-3) will be equal to \(3(-3)+1\)

Answer 4

You've been asked to find f(-1) + 5g(-3).
So, we knew f(-1) is \((-1)^2+1\) and g(-3) is \(3(-3)+1\)

\[f(-1)+5g(-3) \\ \\ =(-1)^2+1+5(3(-3)+1) \\ \\ =?\]