If f(x) = x^2 + 1 and g(x) = 3x + 1, find 2f(1) + 3g(4)

2 answers:

8 0

$\bf \begin{cases}
f(x) = x^2 + 1\\\\
g(x) = 3x + 1
\end{cases}\quad 
\begin{cases}
f(1)=\boxed{1}^2+1\to &\boxed{?}\\\\
g(4)=3(\boxed{4})+1\to &\boxed{?}
\end{cases}
\\\\\\
2f(1)=2\cdot \boxed{?}\qquad \qquad 3g(4)=3\cdot \boxed{?}$

weeeeeb [17]2 years ago

3 0

2f(1)+3g(4)=43

2*(1^2+1)=4
3*(3(4)+1)=39

4+39=43

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If f(x) = -7x + 5x2 + 10, what does f(-2) equal?

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Answer:

f(-2) = 44

Step-by-step explanation:

Hello there! Lets get started solving this function!

For a function, whenever we see f(x) = ... , the function is simply asking the value of the equation at x! So, if replace f(x) with f(-2), we simply substitute x with -2 in the equation! Lets get started!

$f(x) = -7x + 5x^{2} + 10\\f(-2) = -7(-2) + 5(-2)^{2} + 10\\f(-2) = 14 + 20 + 10\\f(-2) = 44\\$