(1+10(1)/(2)+14+cdots+84

If H_(n) =1+(1)/(2)+ cdots + (1)/(n) then value of S_(n) =1 + (3)/(2) + (5)/(3) +cdots + (2n-1)/(n) is

Find the sums given below : 7 + 10(1)/(2) + 14 +….+84 .

Let a = 111 cdots 1 (55 digits ) , b=1 + 10 + 10^(2)+ cdots+ 10^(4) c= 1+10^(5) +10^(10)+ 10^(15) + cdots+ 10^(50) then

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

Find the sums sums given below : 7 + 10(1)/(2)+14+....+84

Find the sum: 1+3+5+7+...+199 (ii) 7+10(1)/(2)+14++84 (iii) 34+32+30+.+10