Question

Write all three formula used to find the sum of n terms in A.P

Answer 1

Answer:

Sum of n terms in AP= n/2[2a + (n – 1)d]

Sum of natural numbers= n(n+1)/2

Sum of square of ‘n’ natural numbers= [n(n+1)(2n+1)]/6

Sum of Cube of ‘n’ natural numbers= [n(n+1)/2]2

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Answer 2

Answer:

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