Question

1+3+5+7+......sum of first 16 odd positive integers is​

Answer 1

Answer:

n²=16²= 256

Step-by-step explanation:

so two hundred and fifty six is the answer

Answer 2

Answer:

256

Step-by-step explanation:

Here,

a =1 , d=3-1=2 , n=16

So,

l = a+(n-1)d

= 1+(16-1)2

= 1+15×2

= 1+30

= 31

Now,

Sn = n/2(a+l)

= 16/2(1+31)

= 8×32

= 256