Question

how to sum them...............​

Answer 1

1square+2square+3square....+ns...

please tell me....

2 answers · Mathematics

Best Answer

We have that:

1² + 2² + 3² + ... + n² = n(n + 1)(2n + 1)/6

We can prove this by induction. First, we need to show that it is true for n = 1.

1(1 + 1)(2 + 1)/6 = 1

So it is true for n = 1.

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