Question

without adding find the sum 1+3+5+7

Answer 1

4+5+7

9+7

16....

I hope it helps

Answer 2

Here Is Your Ans

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Here ,

N = 4

D = 2

A = 1

Sum = N /2 (2a+(N-1)d)

Sum = 2 ( 2 × 1 + 6)

Sum = 16

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