Question

Find the sum of the series 1+4+9+16+..100​

Answer 1

Explanation:

$(1² + 2² + 3² + 4² +................+ 10²)$

$Here , n = 10$

$\frac{n(n + 1)(2n + 1)}{6}$

$\frac{10(10+1)(20+1)}{6}$

$\frac{10 × 11 × 21}{6}$

$\frac{210 × 11}{6}$

$(35 × 11)$

$385$

Answer 2

See The Above answer Mate