Math Help - integration reminder

1. integration reminder

what is these 2 integrated

a) 1/2x^2

b) (1/x^2) - (x^2)

is it

a) -1/2x + c

b) -1/x - x^3 /3

2. Originally Posted by thrusterkel
what is these 2 integrated

a) 1/2x^2

b) (1/x^2) - (x^2)

is it

a) -1/2x + c

b) -1/x - x^3 /3
The second one is right. (Though don't forget that constant!) If the first one is supposed to be $\frac{1}{2x^2}$, then it is also correct (if your answer is $-\frac{1}{2x} + c$.)