Math miscellaneousHard

Question

If a,b and c are in H.P and a,b and - 2c are in G.P., where a,b & c are non-zero, then -

Options

A.-2a,b and -2c are in A.P
B. = 0
C.- 2a,b and - 2c are in G.P
D. = (a + b + c)2

Solution

b = and b2 = - 2ac
⇒ b = ⇒ a + b + c = 0

Create a free account to view solution

View Solution Free
Topic: Math miscellaneous·Practice all Math miscellaneous questions

More Math miscellaneous Questions

If f(1) = 1, f′(1) = 2, then is...If , are such that = 1, || and = √2, = √3, = , then the angle between & is...Let a1, a2, a3, ..... , a49 be in A.P. such that ∑k=012a4k+1 = 416 and a9 + a43 = 66. If a12+a22+....+a172 = 140m,...The equation of the plane containing the line 2x − 5y + z = 3 ; x + y + 4z = 5, and parallel to the plane, x + 3y ...is...