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2014-09-30 16:49:15 -0500 asked a question curves in a plane, find intersecting points?

can anyone please help??? Let n be your ID number and consider the curves in the plane R2 that are defined by the equations, y2 = x3 − nx and xy = 1. At how many points do these curves intersect?

2014-09-30 16:42:10 -0500 asked a question how to compute inverse of function on sage?

can anyone help how do i get the inverse of function on sage f(x) x^3+2x+1 and then the derivative of that. Thanks