Equation of the pair of straight lines bisecting the angles between the lines represented by ax2 + hxy + by2 = 0
None of these
The equation of circle which touches the axes and the line and whose centre lies inthe first quadrant is x2 + y2 - 2cx - 2cy + c2 = 0. Then, c is equal to
1
2
3
6
A.
1
If four digits are taken fromthe digits 1, 2, 3, 4, 5, 6, 7. The probability that the sum of digits is less than 12, is
The probability of happening exactly one of the two events A and B is
P(A) - P(B)
None of the above
If the equation (a2 + 4a + 3)x2 + (a2 - a - 2).x + a(a + 1) = 0 has more than two roots, then values of a is
0
1
- 1
None of the above