Question

Find the first and second derivative of the function. Check to see that your answers are reasonable by comparing the graphs of
f, f ', and f ''.
f(x) = 3x − 4x^7/8

Answer 1

f'(x)=\[3-\frac{ 7 }{ 2 }x ^{-\frac{ 7 }{ 8 }}\]

Answer 2

not quite the power of the derivative is (n - 1) in your question its (7/8 - 1)

Answer 3

-1/8

Answer 4

f''(x)= \[\frac{ 7 }{ 16 }x ^{-\frac{ 9 }{ 8 }}\]

Answer 5

looks ok... well done