Question

find the derivative of the function

please help!!
q(r) =5r/4r+1
q'r = ??

Answer 1

you can use the quotient rule
u'v - uv'/ v^2

Do you know how to proceed?

Answer 2

I have (4r+1) d 5r -5rd (4r+1) / (4r+1)^2

Answer 3

and do you know how to take the derivative of functions like
5x
and 4x+1?

Answer 4

i have 20r +5-20r/16r^2+8r+1 as my final answer..i don't know if its right

Answer 5

Looks right. the 20r and -20r cancel giving you this

Answer 6

thanks!