If x1, x2, x3 as well as y1, y2, y3 are in geometric progression with the same common ratio,then the points, are
vertices of an equilateral triangle
vertices of a right angled triangle
vertices of a right angled isosceles triangle
collinear
ln ABC, if the sides a, b, c are in geometric progression and the largest angle exceeds the smallest angle by 60°, then cos(B) is equal to
1
If the roots of the equation x2 -7x2 + 14x - 8 = 0 are in geometric progression, then the difference between the largest and the smallest roots is
4
2
3
D.
3
are two arithmetic progressions with common differences a and b respectively. If are the arithmetic means of respectively. Then the locus of P is
The sum of the first three terms of a G.P. is S and their product is 27. Then all such S lie in
If |x| < 1, |y| < 1 and x y, then the sum to infinity of the following series (x + y) + (x2 + xy + y2) + (x3 + x2y + xy2 + y3) + ..... is :