# Math Help - Having another problem.

1. ## Having another problem.

Find the definite integral.

$\int_1^4 \frac{1}{x\sqrt{16x^2-5}}dx$

I tried multiplying the integral by 5, and putting a 5 in the denominator, and working that into the radical, but I still can't get the denominator to fit the equation of the arcsec.

Thanks for taking a look!

2. Originally Posted by xfriendsonfirex
Find the definite integral.

$\int_1^4 \frac{1}{x\sqrt{16x^2-5}}dx$

I tried multiplying the integral by 5, and putting a 5 in the denominator, and working that into the radical, but I still can't get the denominator to fit the equation of the arcsec.

Thanks for taking a look!
Look at this link to see how to integrate.