Question

Solve this equation again!

Answer 1

Answer:

1+3+5+7+11+………+45

The Common Difference is 3–1 = 2

Total no of terms can be found using below formula

T1 = a+(n-1)d

Tn=a+(n−1)d  

Tn is the nth Term

a is the First Ter

n is the no of Terms

d is the common difference

Here TN is 45, d=2

45=1+(n-1)2;

44=2n-2

2n=46

n=23

There are total 23 terms in this series. Sun can be found using below formula

Sum  S=n/2a+l

a is the first term and l is the last term

S = 23/2(1+45)

S = 11.5 * 46

S = 529