If m:n = 3:5 and m:r = 2:3, then find n:r.

If m = 3 and n = 2 find the value of 2m^3 +3n^2- 5 m^2n

If m = 3 and n = 2 find the value of m^n-n^m

If m:n=3:2, then find the ratio (4m+5m):(5m-5n)

If 5m-n =3m +4n , then find the values of the following expression: (3m+4n)/(3m-4n)

If m:n=5:4 , then find the value of the ratio (5m+3n):(3m+n)

If (m + n)/(m + 3n) = (2)/(3) , find : (2n^(2))/(3m^(2) + mn) .

Let T_r denote the rth term of a G.P. for r=1,2,3, If for some positive integers ma n d n , we have T_m=1//n^2 and T_n=1//m^2 , then find the value of T_(m+n//2.)

Let T_r denote the rth term of a G.P. for r=1,2,3, If for some positive integers ma n d n , we have T_m=1//n^2 and T_n=1//m^2 , then find the value of T_(m+n//2.)

If m/n =5/2 then find values (3m+4n)/(3m-4n)