what is the value of
1/1*2*3 + 1/2*3*4 + 1/3*4*5 ........and so on..
will it be done by method of difference
\(t_r=\frac{1}{r(r+1)(r+2)}=\frac{1}{2}[\frac{1}{r(r+1)}-\frac{1}{(r+1)(r+2)}]\)
Now try method of difference....
thank you sir..
siir is their a method to find this out since i used another two fractions and was not getting the answer i used the following would you please tell me what is wrong in it
Tr=1/r(r+1)(r+2) = 1/r(r+1) - 1/r(r+2)
Cancellation is central thing in this method and r(r+1) and r(r+2) approach won't get that.