Question

Evaluate the function at the indicated value.
Function: f(x)=x^3+7x
Value: f(1/3)=

Answer 1

Just plug in 1/3 wherever you see x

Answer 2

f(1/3) = (1/3)^3 + 7(1/3)
Can you solve that?

Answer 3

= (1/27) + (7/3)

Answer 4

put x=1/3 in place of x

Answer 5

so I believe 64/27

Answer 6

Thank you! I've been trying to figure out what I did wrong because webassign was being picky and wouldn't take the decimal form.

Answer 7

No problem :)

Answer 8

\(f(x) = \dfrac{1}{3}^3+7(\dfrac{1}{3})\)

\(f(x) = \dfrac{1}{27}+\dfrac{7}{3}\)

\(f(x) = 2\dfrac{10}{27}\)