Question

1² + 2² + .... + 50²​

Answer 1

according to question
sum of ap = n^2

s1 = a1

1 = a1

a2 = s2 - s1

a2 = 4 - 1 = 3

d = 2

s 50 = n/ 2 ( 2a + (n -1) d)

s 50 = 25 ( 2 + 98)

s 50 = 2500

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