(20)
Find the GM between (x + y) and x3 + 3xy (x + y) + y3 Solution:
a=x+y b = x3 + 3xy (x + y) + y3 G=
ab
G = ................................................. G = ................................................. G = ................................................. G = ................................................. G = x2 + y2 + 2xy (21)
If 8, x+1, T2 are in GP find x. Solution:
Hint G=
62
ab