Posted by **Raj** on Tuesday, January 22, 2008 at 10:01pm.

I can't figure this one out, the antiderivative of x^-1.

I thought it would be c, but the derivative of c is zero.

- Antiderivatives -
**drwls**, Tuesday, January 22, 2008 at 11:20pm
That would be the integral of 1/x. It is called the natural logarithm of x, or ln x.

You can't use the rule that the integral of x^n is x^(n+1)/(n+1) on this one, because n = -1 and you get a zero denominator

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