Math, asked by wru777, 15 days ago

2. Find the sum 20²+19²+18²+ ___ +1²

Answers

Answered by nanditapsingh77

0

20²+19²+18²+...+1²

Sum of n square no.s = n×(n+1)×(2n+1)6n×(n+1)×(2n+1)6

= 20(20+1) × (2×20+1)6 × 20 × (20+1) × 6 × 20 × (20+1) × (2×20+1)

= 20 × 21 × 41 × 6 × 20 × 21 × 6 × 20 × 21 × 41

= 4.4835094

PLZ MARK AS BRAINLIEST

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