Find the sum 12+22+32+……………+102. - Vidyadip

MCQ

Find the sum 1²+2²+3²+……………+10².

A
325
B
365
C
385
D
435

✓

Answer

435

Solution:

We know, sum of cubes of first n terms is given by

$\Big(\frac{\text{n}(\text{n}+1)}{2}\Big)^2.$

$\text{Here},\text{n}=8. \text{ so },\text{sum}=\Big(\frac{8\times9}{2}\Big)^2=1296.$

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