If the normal to the curve y = f(x) at (3, 4) makes an angle with the positive x-axis, then f'(3) is equal to :
- 1
1
-
Let A = {1, 2, 3, ... , n} and B = {a, b, c}, then the number of functions from A to B that are onto is:
3n - 2n
3n - 2n - 1
3(2n - 1)
3n - 3(2n - 1)
Everybody in a room shakes hands with everybody else. The total number of hand shakes is 66. The total number of persons in the room is:
9
12
10
14
A box contains 9 tickets numbered 1 to 9 inclusive. If 3 tickets are drawn from the box one at a time, the probability that they are alternatively either {odd, even, odd} or {even, odd, even}is:
If b2 4ac for the equation ax4 + bx2 + c = 0, then all the roots of the equation will be real if:
b > 0, a < 0, c > 0
b < 0, a > 0, c > 0
b > 0, a > 0, c > 0
b > 0, a > 0, c < 0
B.
b < 0, a > 0, c > 0
If b2 - 4ac 0, then the equation ax4 + bx2 + c = 0 has all roots real, if b < 0, a> 0, c > 0