The sum of n terms of the following series 1 + (1 + x) + (1 + x + x2) +... will be
None of the above
If A1, A2; G1, G2 and H1, H2 be two AM's, GM's and HM's between two quantities, then the value of is
The angle between the straight lines
is
90
A.
90
Given, equations of straight lines are,
On comparing with ax + by = 0, we get
The value of k so that x2 + y2 + kx + 4y + 2 = 0 and 2(x2 + y) - 4x - 3y + k = 0 cut orthogonally is
An equilateral triangle is inscribed in the parabola y2 = 4ax, whose vertex is at the vertex of the parabola. The length of its side is
2a
4a
8a
The complex numbers sin(x) + i cos(2x) and cos(x) - i sin(2x) are conjugate to each other for
x =
x = 0
No value of x