Find the value of
15^2 +16^2 +17^2 +....+ 40^2
Answers
Answered by
0
Answer:
15²+16²+17²+40²
225+256+289+1600=2370
Step-by-step explanation:
Answered by
2
We know
Sum of squares till n natural no. Is
n(n+1)(2n+1) / 6
So. 15^2 + 16^2 + 17^2 Till 40^2
= 40(41)(81) / 6 - 14(15)(29) / 6
= 20 x 41 x 27 - 7 x 5 x 29
= 22140 - 1015
= 21125
Sum of squares till n natural no. Is
n(n+1)(2n+1) / 6
So. 15^2 + 16^2 + 17^2 Till 40^2
= 40(41)(81) / 6 - 14(15)(29) / 6
= 20 x 41 x 27 - 7 x 5 x 29
= 22140 - 1015
= 21125
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