The sum of the series : `1+1/(1+2)+1/(1+2+3)+......` upto 10 terms is :

The sum of series 1 + 1/( 1 + 2) + 1/( 1 + 2 + 3) + ... upto 10 terms can be expressed in its lowest form as p/ q where p , q , ∈ I then the value of ( p − q ) is:

The sum of the series : 1 + (1)/(1 + 2) + (1)/(1 + 2 + 3)+ .... up to 10 terms, is

The sum of the series : 1 + (1)/(1 + 2) + (1)/(1 + 2 + 3)+ .... up to 10 terms, is

Find the sum of the series 1+3x+5x^(2)+7x^(3)+...... upto n terms.

77.The sum of the series 1.3^(2)+2.5^(2)+3.7^(2)+.... upto 25 terms

The sum of the series 1/(2!) - 1/(3!) + 1/(4!) - …….. upto infinity is

The sum of the series 1 + 2 xx 3 + 3 xx 5 + 4 xx 7+ ...upto 11th term is

The sum of the series 1 + 2 xx 3 + 3 xx 5 + 4 xx 7+ ...upto 11th term is