Thread: evaluating a definite integral

if I evaluate



I get e^6 - e^2 but the answer should be (1/2)(e^6 - e^2), where does the (1/2) come from?

Hey kingsolomonsgrave.

Try doing a transformation u = 2x where du/dx = 2 which means you have to multiply by a 1/2 and the limits go from [1,3] to [2,6]

The reason your answer is wrong is because:



but:



Using the substitution suggested by chiro is the best way to go, IMHO.

thanks!