Math, asked by SwagatSingh, 9 months ago

I need to know the steps to solve the above question

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Answers

Answered by Anonymous

2

Step-by-step explanation:

1²+2²+3²+........20²=2870

2²+4²+6²+.....40²=

take common 2² from lhs

2²(1²+2²+3³......20²)=4×2870=11480

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