Question

find the sum of the first 15 multiples of 8​

Answer 1

Hey mate ,

Kindly find the attachment!!!

here it is clearly given that we have to find sum of first 15 multiples .. so the 'n' becomes 15 .

Otherwise we can also find it by formula of An

Hey mate ,

I'm sorry there is a calculation mistake at last ..

15×64 = 960 not 1880.

Hope you find it helpful!!

Do mark it as brainliest!!

Answer 2

Answer:

the sum of first 15 multiples of 8 are 8,16,24,32,40,48,56,64,72,80,88,96,104,112 and 120

Step-by-step explanation:

8 + 16 + 24 + 32 + 40 + 48 + 56 + 64 + 72 + 80 + 88 + 96 + 104 + 112 +120 = 960