Integral Fail

[Albert Chan]

(08-15-2020 01:44 AM)lrdheat Wrote:  Hi Albert,

Are you sure about this? When I do this problem using numerical integration On the Prime, Classpad, and TI-30X Pro Math Print, I get 3.46+ which equals the “correct” NSpire result. This does not agree with your result (unless I am doing something wrong...).

To reproduce your result, I am assuming integral limit from -1 to 1

XCas> gaussquad((x^2-2*x+1)^(4/3), x=-1 .. 1)     → 3.46342047702

F(x) = 3/11 * (x-1) * abs(x-1)^(8/3)

F(1) - F(-1) = - F(-1) = 3.46342047702 ...