# Thread: can someone confirm that this is right

1. ## can someone confirm that this is right

f(x)=ln((x²√4x+1)/(x³+5)³)

f'(x)=(2/x)+(2/4x+1)-(9x²/x³+5)

thank you

2. Originally Posted by johnnyc418
f(x)=ln((x²√(4x+1))/(x³+5)³)

f'(x)=(2/x)+(2/(4x+1))-(9x²/x³+5)

thank you
I've added the brackets you obviously have used - and with these brackets your answer is OK.