1.

Find the sum of x(x+y) + x^(2) (x^(2) + y^(2)) + x^(3) (x^(3) + y^(3))+……..to n terms

Answer»


Answer :`x^(2) ((x^(2N)-1)/(x^(2)-1)) + XY (((xy)^(n)-1)/(xy-1))`


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