Question

Challenging question......






(From Ch. Arithmetic Progression)

Answer 1

hey, you post a title like "challenging question" and it's like catnip for math geeks :-)

Answer 2

If \(\large a_1,a_2.....,a_{n+1}\) are in A.P, then

\(\large \frac{1}{a_1a_2}+\frac{1}{a_2a_3}+.........+\frac{1}{a_na_{n+1}}\) is :

Answer 3

lol

Answer 4

what??? @dan815

Answer 5

make use of partial fraction and use telescoping

Answer 6

i don't understand??? experiment

Answer 7

can u write out Sn of 1 and 2 and 3 see if u find a pattern