Find the exact expression for V'(t).

Question

The value of a certain automobile purchased in 1997 can be approximated by the function V(t) equals 25 (0.88)^t , where t is the time, in years, from the date of purchase, and V (t) is the value, in thousands of dollars.

 Find the exact expression for V'(t).

 

I got 25ln(.88)(.88)^x  but the computer marked it as wrong. How do I arrange this answer correctly with the correct placement of parenthesis, etc?

Thank you!

Answer 1

V'(t)  = 25*0.88^t*ln(0.88)

 

Well - u did it right, only .... why on earth u put there "x" instead "t" ...

consider that: and let now.