.Find the sum: `1/5+1/5+2/5`

Find the sum: 5/9+\ 6+1 5/7

Find the sum 3 C_1 + 5C_2

Find the sum 3(1)/(5)+4(3)/(5)+7(2)/(5)

Find the sum (1^4)/(1xx3)+(2^4)/(3xx5)+(3^4)/(5xx7)+......+(n^4)/((2n-1)(2n+1))

Find the sum (-4/9 + (-5)/12 + 1/18)

Find the sum: sum_(n=1)^(10){(1/2)^(n-1)+(1/5)^(n+1)}dot

Find the sum of 1/(1!(n-1)!)+1/(3!(n-3)!)+1/(5!(n-5)!)+ ...,

Find the sum of: 24 terms and n terms of 2 (1)/(2) , 3 (1)/(3) , 4 (1)/(6) ,5 ,......,

Prove that : Find the sum of the infinite series 1+(2)/(3).(1)/(2)+(2.5)/(3.6)((1)/(2))^(2)+(2.5.8)/(3.6.9)((1)/(2))^(3)+......oo

Find the sum of the series 1/(3^2+1)+1/(4^2+2)+1/(5^2+3)+1/(6^2+4)+oo