Find the sum to n terms of the series `(1)/(1*3*5*7*9)+(1)/(3*5*7*9*11)+(1)/(5*7*9*11*13)+"......"`. Also, find the sum to infinty terms.

find the sum upto n terms of the series (1)/(1*3)+(1)/(3*5)+(1)/(5*7)+...

Find the sum to n terms of the series: 1/(1. 3)+1/(3. 5)+1/(5. 7)+

Find the sum to n terms of the series: (1)/(1.3)+(1)/(3.5)+(1)/(5.7)+...

Find the sum of n terms of the series 1.3.5+3.5.7+5.7.9+dots

If the sum to n terms of the series (1)/(1*3*5*7)+(1)/(3*5*7*9)+(1)/(5*7*9*11)+"......" is (1)/(90)-(lambda)/(f(n)) , then find f(0), f(1) and f(lambda)

If the sum to n terms of the series (1)/(1*3*5*7)+(1)/(3*5*7*9)+(1)/(5*7*9*11)+"......" is (1)/(90)-(lambda)/(f(n)) , then find f(0), f(1) and f(lambda)

If the sum to n terms of the series (1)/(1*3*5*7)+(1)/(3*5*7*9)+(1)/(5*7*9*11)+"......" is (1)/(90)-(lambda)/(f(n)) , then find f(0), f(1) and f(lambda)

If the sum to n terms of the series (1)/(1*3*5*7)+(1)/(3*5*7*9)+(1)/(5*7*9*11)+"......" is (1)/(90)-(lambda)/(f(n)) , then find f(0), f(1) and f(lambda)