I've been waiting for 3 hrs+ me ! let line pa and line pc be tangents from p to a circle. let b and d be points on the circle such that b, d, and p are collinear. prove that ab*cd = bc*da.

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints