Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
find the sum of the given series.description given in the image
PFA
(r2+1) . r! = (r2+2r+1).r! -2r.r! = (r+1)2r! – 2r.r! = (r+1) (r+1)r! – 2r.r! = (r+1).(r+1)! – r.r! – r.r! =[(r+1).(r+1)! – r.r!] – [(r+1)! – r!] Thus, the summation is seen to be sum of two telescoping series. The required sum is easily obtained as (n+1). (n+1)! – (n+1)! = n.(n+1)!
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -