Math, asked by akhileshsahu165, 19 days ago

taking n = 9,10 and 20 one by one, and verify that
n=n×(n+1) ÷2

.

Answers

Answered by srishtimahour746

0

Answer:

n is not

n=n×(n+1)÷2

=2n=n(n+1)

2n/n=(n+1)

n=n+1

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