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
C.
Let the two quantities be a and b. Then a, A1, A2, b are in AP.
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