Question

what is the sum of 1² to 99²

Answer 1

Answer:

9802

Step-by-step explanation:

1² + 99²

1+9,801

=9802

Answer 2

Answer:

$sum \: of \: {1}^{2} \: to \: {99}^{2} = 328350$

Step-by-step explanation:

$sum \: of \: {1}^{2} \: to \: {99}^{2} \\ \frac{n(n + 1)(2n + 1)}{6} \\ now \: putting \: no. \: in \: formula \\ n = 99 \\ \frac{99(99 + 1)(2 \times 99 + 1)}{6} \\ \frac{(99 \times 100)(198 + 1)}{6} \\ \frac{9900 \times 199}{6} \\ \frac{1970100}{6} \\ 328350 \\ ∴ \: sum \: of \: {1}^{2} \: to \: {99}^{2} \\ = 328350$