Question

Please help me to solve this integral

Answer 1

\[\int\limits_{}^{} \frac{ dx }{ \sqrt{x^2 -49} }\]

Answer 2

i cant figure it out

Answer 3

Have you learned about trigonometric substitution?

Answer 4

oh yes thats right

Answer 5

i forgot abt that

Answer 6

Yep. So this fits one of those forms. Do you know which one works for this integral?

Answer 7

\[\sqrt{u^2 - a^2}\]

Answer 8

Right, which would be a u = 7sec(theta) substitution. I have to head out unfortunately, but trig sub is definitely the route to go. Good Luck

Answer 9

thank you