The value of `sum_(n=1)^oo1/(2n(2n+1))` is equal to

sum_(n=1)^(oo) (1)/(2n(2n+1)) is equal to

If sum_(r=1)^(n)T_(r)=(n(n+1)(n+2))/(6), then the value of sum_(r=1)^(oo)((1)/(T_(r))) is equal to

sum_(n=1)^(oo)(1)/(2n(2n+1))=

sum_(n=1)^(oo)(n^(2))/(n!) is equal to

The value of sum_(n=1)^(oo)(1)/((3n-2)(3n+1)) is equal to (p)/(q), where p and q are relatively prime natural numbers.Then the value of (p^(2)+q^(2)) is equal to

The value of sum_(n=1)^(oo)(4n-2)/(3^(n))

The value of sum_(n=1)^oo(-1)^(n+1)(n/(5^n)) equals

The value of sum_(n=1)^oo(-1)^(n+1)(n/(5^n)) equals

The value of sum_(n=1)^oo(-1)^(n+1)(n/(5^n)) equals