2012-12-10, 09:52 PM
Bumping because I have a math midterm and arc lengths suck.Find the length of lnx from 1 to sqrt(3).
I'm getting u + 0.5ln(u + 1) - 0.5ln(u -1), where u = sqrt(1+ x^2), as the integral I'm plugging numbers into, but yahoo answer tells me it's sqrt(1 + x^2) - ln | [1 + sqrt(1 + x^2)] / x, so I dunno if I'm doing it right.
I'm getting u + 0.5ln(u + 1) - 0.5ln(u -1), where u = sqrt(1+ x^2), as the integral I'm plugging numbers into, but yahoo answer tells me it's sqrt(1 + x^2) - ln | [1 + sqrt(1 + x^2)] / x, so I dunno if I'm doing it right.