Please help me i suck at math

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

What other information do you need to prove triangle dac=bca by asa

Which statement justifies why angle ebc measures 90?