Question

1. What is the sum of the first 8 odd numb​

Answer 1

The number series 1, 3, 5, 7, 9, . . . . , 15. Therefore, 64 is the sum of first 8 odd numbers.

Answer 2

Step-by-step explanation:

SO FIRST WE WILL FIND FISRT 8 ODD NUMBERS: 1,3,5,.......................,15

NOW WE HOW MANY TERM ARE THERE LET THIS WILL BE n

Now,

last term=a+(n-1)d

15=1+(n-1)2

15=1+2n-2

15=2n-1

15+1=2n

16=2n

n=16/2

n=8

NOW FIND SUM

SUM=n/2(a+l)

S=8/2(1+15)

S=4(16)

S=64