thnks bhaiya but can u tell why are we taking
n>=4
and another thing its terms are in form >>
dint understand dis step [2] >> tn+1/tn= 2/(n+1) ..
tn+1/tn = 2/(n+1)
this <1/2 for all n>=4
hence the sum is less than t1+t2+t3+t4+t4/2+t4/8+t4/16+.....
=t1+t2+t3+2t4
hence the sum is convergent :)
thnks bhaiya but can u tell why are we taking
n>=4
and another thing its terms are in form >>
dint understand dis step [2] >> tn+1/tn= 2/(n+1) ..