huma1507 huma1507

26-05-2019
Mathematics

contestada

find the sum of the following without actually adding: 1+3+5+7+9+11+13+15

Respuesta :

bhawnau233 bhawnau233

26-05-2019

use this formula Sn=n/2[2a+(n-1)d]

here,d=a2-a1 and n= no. Of terms

Step-by-step explanation:

S8=8/2[2(1)+(8-1)2]

S8=64

Answer Link

vadhershubhambhai vadhershubhambhai

26-05-2019

Answer:

Step-by-step explanation:

The following numbers are successive odd numbers.

The sum of successive odd numbers (starting from 1) is always the square of number of terms you are adding.

Hear there are 8 terms. Square of 8 is 64.

Hence the sum of this numbers is 64.

Answer Link

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