Sum of the series `sum_(r=1)^n (r^2+1)r!,` is

Find the sum of the series sum_(r=1)^(n) r x^(r-1) using calculus .

Find the sum of the series sum_(r=1)^(n)r xx r!

Find the sum of the series sum_(r=1)^n r/((r+1) !)dot

The sum of the series sum_(r=0) ^(n) ""^(2n)C_(r), is

The sum of the series sum_(r=0) ^(n) ""^(2n)C_(r), is

Find the sum of the series (sum_(r=1)^(n) rxxr !)

Find the sum of the series sum_(r=1)^n rxxr !dot

Find the sum of the series (sum_(r=1)^(n) rxxr !)

Find the sum of the series sum_(r=1)^n rxxr !dot

If the sum of the series sum_(n=0)^(oo)r^(n),|r|<1 is s then find the sum of the series sum_(n=0)^(oo)r^(2n)