To compute arc length you must integrate over the indicated interval.
simple question of two problems that are alike
1
the interval is 5 ≤ x ≤ 7, the function is y = [(x^4)/4] + [1/(8x^2)]
here, i just integrate function from 5 to 7, correct?
2
the interval is 1≤ x ≤ 9, but i am given an integral from one to x of √[(t^3) - 1]dx
i just replace x with 9 and evaluate, correct?
forgive english please! thank you