Sum the following series to n terms and to infinity `sum_(r=1)^n r(r+1)(r+2)(r+3)`

Find sum of the following series to n terms and to infinity: sum_(r=1)^(n)(1)/(4r^(2)-1)

Sum the following series to n terms and to infinity : (i) (1)/(1.4.7) + (1)/(4.7.10) + (1)/(7.10.13) + ... (ii) sum_(r=1)^(n) r (r + 1) (r + 2) (r + 3) (iii) sum_(r=1)^(n) (1)/(4r^(2) - 1)

Find sum_(r=1)^n = r(r - 3) (r - 2)

Find the sum sum_(r=1)^n r(r+1)(r+2)(r+3)

Find the sum sum_(r=1)^n r(r+1)(r+2)(r+3)

sum_(r=1)^(n)(3^(r)-r)=

Find the sum sum_(r=1)^n r(r+1)(r+2)(r+3)dot

Find the sum sum_(r=1)^(n)r(r+1)(r+2)(r+3)

Find the sum sum_(r=1)^(n)(1)/(r(r+a)(r+2)(r+3))