IF `a=2/3 `, `b=(-5)/6` and `c=7/d`,show that (a-b)-c` ne`a-(b-c)

If a : b = 2:3, b: c= 4:5 and c:d=6:7, then a:d=

If 2^(a)=3^(b)=6^(c) then show that c=(ab)/(a+b)

If a,b,c,d………are in G.P., then show that (a-b)^2, (b-c)^2, (c-d)^2 are in G.P.

mu = {2,3,4,5,6,7,8} , A = {2,3} , b = {4,5} and C = {6,7,8} , then A^(c ) nn (B nn c)^(c ) is

(2) If A:B=2:3 , B:C=4:5 and C:D=6:7, find A:D

If (3a+5b):(3a-5b): :(3c+5d):(3c-5d) , then show that a,b,c and d are in proportion.

if (2a+3b+4c+5d)/(2a-3b-4c-5d)=(2a-3b+4c-5d)/(2a-3b-4c+5d) , then show that a,3b,2c and 5d are in proportion.

If a,b,c,d be in G.P. show that (b-c)^2+(c-a)^2+(d-b)^2=(a-d)^2.

If a: b= 5:7 and c:d=2a:3b, then ac: bd is :

If a,b,c,d………are in G.P., then show that (a+b)^2, (b+c)^2, (c+d)^2 are in G.P.