Cube root with Sigma

Algebra Level 2

∑ n = 9261 3 15625 3 n \sum_{ n =\sqrt[3]{9261}}^{\sqrt[3]{15625}} n =

To make the cube root part easier , refer my note


The answer is 115.

Kartik Kulkarni by Kartik Kulkarni , 20, India

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1 solution

Nikhil Moghe
Feb 17, 2015

9261 is the cube root of 21 which is the lower limit of the given summation and 15625 is the cube root of 25 which is the upper limit. therefore we have to add 21 +22+23+24+25 =115

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