Question

if a=1+3+5+_+99;b=2+4+6+8+_+100 then the value of a-b is​

Answer 1

2n-1=99

2n=100

n=50

a=n^2

=50^2

=2500

b

=2(1+2+3+4+.....+50)

=2550

a-b=-50