Progression

Calculus Level 2

Let 1 + x 5 + x 10 + x 15 . . . . . . . . . = M 1+x^{5}+x^{10}+x^{15}.........=M ,if M = 32 31 M=\frac{32}{31} and |x|<1,then find the value of x − 1 x^{-1} is

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Surekha Jadhav by Surekha Jadhav , 51, India

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1 solution

Surekha Jadhav
Apr 28, 2015

Use Infinite sum to G .P = a 1 − r \frac{a}{1-r} where "a" is first term and "r" is common ratio.

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