Question

iv) Find the sum of first n natural numbers​

Answer 1

Answer:

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Answer 2

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Natural numbers : 0,1,2,3,4....

a=0

d=1

S'n = n/2 ×(2a+(n-1)d)

S'n=n/2 × (0 +(n-1)1)

S'n = n/2 × (n -1)

S'n = n²-n/2

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...Hope it helps....