Question

find the number of term of series 2 + 4 + 6 + 8 and so on equal to 10000 hundred

Answer 1

here is the solution
a=2
d =2
Sn =10000
Sn =n/2( 2a+(n-l)d)
10000 =n/2( 4+ (n-1)2)
Now calculate n