If A(z1), B(z2), C(z3) and P(z) represent complex numbers such that , then, A, B, C lies on
a straight line
a circle
a parabola
an ellipse
If the complex numbers z, z, and origin form vertices of an equilateral triangle, then the value of z12 + z22 will be
z1z2
z1 + z2
2z1z2
z1 - z2
Three numbers form an increasing GP. If the middle term is doubled, then the new numbers are in AP. The commonratio of the GP will be
If the equations ax2 + 2cx + b = 0 and ax2 + 2bx + c = 0 have a common root, then the value of a + 4b + 4c will be
2
1
- 1
Non eof these
If one root of ax2 + bx + c = 0 is twice the other root, then
b2 = 9ac
2b2 = 9ac
2b2 = ac
b2 = ac
B.
2b2 = 9ac
Let the roots ofthe equation ax2 + bx + c = 0 be , then other root is .