Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of theseries
If B−2A=100λ, then λ is equal to :
496
232
248
464
Sum of n terms of an AP -
and
Sum of n terms of an AP
- wherein
first term
common difference
number of terms
Option 1)
496
Option 2)
232
Option 3)
248
Option 4)
464
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