[" 32.Sum of first "n" natural numbers is given by "(n(n+1))/(2)" ."],[" What is the geometric mean of the series "1,2,4,8,],[2^(n)?]

The geometric mean of the series 1,2,4,8,16,dots.,2^(n) is

The geometric mean of the series 1,2,4,8,16,....,2^n is

The sum of the first 'n' natural numbers is given by the formula S=(n(n+1))/2 . Find 'n' if the sum is 465.

The sum of first n odd natural numbers is 2n-1 (b) 2n+1 (c) n^2 (d) n^2-1

The sum of first n odd natural numbers is 2n-1 (b) 2n+1 (c) n^2 (d) n^2-1

The sum of first n natural numbers is given by the expression ( n ^(2))/(2) + (n)/(2). Factorise this expression.

Property 6 The sum of first n odd natural numbers is n^(2)

If the sum of first ^(6)n' natural numbers is (n(n+1))/(2). Then,what will be the sum of first 'n'terms of the series of alternate positive and negative numbers of alternate positive 1^(2)-2^(2)+3^(2)-4^(2)+5^(2)-...

The sum of first n terms of a certain series is given as 3n^(2)-2n . Show that the series is an arithmetic series.