Find the sum of first n terms of the series, 4+5+8+13+20+…

Find the sum of first n terms of the series, 5+6+8+12+20+…

Find S_n for the series. 1.5 + 2.6 + 3.7 + …..

Find S_n for the series. 2.3 + 3.6 + 4.11 + ….

Find the sum of the infinite series. 1/(2.5.8)+1/(5.8.11)+1/(8.11.14)+...

Find the sum of the infinite series. 1/(1.2.3)+1/(2.3.4)+1/(3.4.5)+...

Find the sum of the infinite series. 1/(1.5)+1/(3.7)+1/(5.9)+...

Find S_n for the series. 1.2 + 2.3 + 3.4 +…

In a Binomial distribution, the sum of its mean and the variance is 1.8 . Find the probability of two successes, if the event was conducted 5 times.

Find the sum of the infinite series. 3/(1^(2).2^(2))+5/(2^(2).3^(2))+7/(3^(2).4^(2))+...