Problem Solving (PS) | Re: Let An be the sequence such that its Nth term is the sum of the

ant to apply that formula
,You are not applying it right

Bn is series of first 50 odd numbers
1,3,5,7..

So 50th term of Bn=1+49*2=99
(a+(n-1)d)

Then u can apply the formula u mentioned above.

Formula I used= n(2a+(n-1)d)/2
This
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