`(1)+(1+2)+(1+2+3)+`

Find the sum: 1 + (1)/(2) (1 + 2) + (1)/(3) (1 + 2 + 3) + ……up to 16 terms.

Find the sum 1+(1)/(1+2) + (1)/(1+2+3) + cdots+ (1)/(1+2+3+cdots+ n )

For all ninNN , prove by principle of mathematical induction that, 1+(1)/(1+2)+(1)/(1+2+3)+ . . .+(1)/(1+2+3+ . . .+n)=(2n)/(n+1) .

Sum of the series S = 1 + (1)/(2)(1 + 2) + (1)/(3) ( 1 + 2 + 3 ) + (1)/(4) ( 1 + 2 + 3 + 4 ) + …… upto 20 terms is

lim_ (n rarr oo) (1+ (1) / (2) + (1) / (2 ^ (2)) + (1) / (2 ^ (3)) + ...... (1) / (2 ^ (n))) / (1+ (1) / (3) + (1) / (3 ^ (2)) + (1) / (3 ^ (3)) ...... (1) / (3 ^ (n)))

If A=[{:(1, 1, 1),(1, 2, "-3"),(2,"-1",3):}] , then adj A is

If A=[{:(1, 1, 1),(1, 2, "-3"),(2,"-1",3):}] , then adj A is

Find the value of x if |(x-1,x+1,1),(1,2,1),(1,2,3)| =0

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