[" 2.(i) "1.3+3.5+5.7+.." to "n" terms "],[" (ii) "1.2+2.3+3.4+..." to "n" terms "]

1.3+3.5+5.7+.....n terms =

Find the sum of the GP : (i) sqrt(7)+sqrt(21)+3sqrt(7)+... to n terms (ii) 1-1/3+1/3^(2)-1/3^(3)+... to n terms (iii) 1-a+a^(2)-a^(3)+... to n terms (a ne 1) (iv) x^(3)+x^(5)+x^(7)+... to terms (v) x(x+y)+x^(2)(x^(2)+y^(2))+x^(3) (x^(3)+y^(3))+... to n terms

If (1xx3 + 2xx5 + 3xx7 + ….. upto n terms) / ( 1^3 + 2^3 + 3^3 + …… upto n terms) = 5/9, find the value of n.

If (1 + 2 + 3 + 4 + 5 +………..upto n terms) / ( 1xx2 + 2xx3 + 3xx4 + 4xx5 + …. upto n terms) = 3/22 Find the value of n

{:("If",a = 1 + 2 + 4 + ..."to n terms"),(,b = 1 + 3 + 9 + ..."to n terms"),(,c =1 + 5 + 25+ ..."to n terms"):} then |(a,2b,4c),(2,2,2),(2^(n),3^(n),5^(n))|=

{:("If",a = 1 + 2 + 4 + ..."to n terms"),(,b = 1 + 3 + 9 + ..."to n terms"),(,c =1 + 5 + 25+ ..."to n terms"):} then |(a,2b,4c),(2,2,2),(2^(n),3^(n),5^(n))|=

{:("If",a = 1 + 2 + 4 + ..."to n terms"),(,b = 1 + 3 + 9 + ..."to n terms"),(,c =1 + 5 + 25+ ..."to n terms"):} then |(a,2b,4c),(2,2,2),(2^(n),3^(n),5^(n))|=

{:("If",a = 1 + 2 + 4 + ..."to n terms"),(,b = 1 + 3 + 9 + ..."to n terms"),(,c =1 + 5 + 25+ ..."to n terms"):} then |(a,2b,4c),(2,2,2),(2^(n),3^(n),5^(n))|=

If a=1+2+4+ . . . . upto n terms b=1+3+9+. . . . upto n terms c=1+5+25+. . . . upto n terms then Delta= |[a,2b,4 c],[2,2,2],[2^n,3^n,5^n]|=