Find the sum of (a) first 50 even number (b) first 50 odd number
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4
(a) for even no.
a=2 n=50 & d=2
sum of first 50 even no.
= a+(n-1)d
= 2+(50-1)2
= 2+49×2
= 100
(b) for odd no.
a=1 n=50 & d=2
sum of first 50 odd no.
=a+(n-1)d
=1+(50-1)2
=1+49×2
=99
a=2 n=50 & d=2
sum of first 50 even no.
= a+(n-1)d
= 2+(50-1)2
= 2+49×2
= 100
(b) for odd no.
a=1 n=50 & d=2
sum of first 50 odd no.
=a+(n-1)d
=1+(50-1)2
=1+49×2
=99
Answered by
1
For (A) Sn=3550
For (B) Sn=1275
For (B) Sn=1275
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