Question

write a program to find the sum of the following series: S = ½ -¾ + ⅚- ......... 19/20​

Answer 1

Answer:

Sn = n/2 ( a+ l)

here

"Sn" is sum of all terms

"a "is 1/2 and" l "is 19/20 and for "n" you have to use "An" formula. and that is

An = a +( n-1) d

here "An "is last term that is 19/20

"a "is 1/2 and

"d" is second term minus first term

then we will get " n" value