Question

Without adding find the sum:-
1+3+5+7+9+11+13

I will surely mark as Brainliest who will give answer with correct explanation ​

Answer 1

Answer:

Given:

$1+3+5+7+9+11+13 = ?$

Solution :

$1 + 3 +5 +7+9+11+13$

It is the sum of first n odd natural numbers. We know the formula that sum of n odd natural numbers is n²

$\boxed{\sum\limits_{n = 0}^{2n + 1} = n^2}$

$\therefore 1 + 3 + 5+7+9+11+13 = 13^2$

$\implies 1+3+5+7+9+11+13 = 169$

Answer 2

Hello , here is your answer

1+3+5+7+9+11+13 = 49

As the sum of first n natural numbers is the square of number n.

Here n = 7

So without adding we get the sum as 7*7=49

Hope it helps !!!

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