Given f: N→N, If f={(1,3) (2,5) (3,7).........} then f(x)=
2x + 1
2x - 1
x + 1
x - 1
The inverse function of logex is
10x
10-x
ex
e-x
If f(x) = x2-5x+3, then f(1) =
3
1
0
-1
The domain of sin-1 [log3(x/3)] is
[1, 9]
(-1, 9)
(-9, 1)
(-9, -1)
The period of f(x) = sin 4x + tan 2x is
2π
π
π/2
None of these
If f(x) = x2 - 1/x2, f(x) =
-f(1/x)
f(1/x)
-f(x)
f(x2)
Let X = {2,3} and Y = {1,3,5}. How many different functions are there from X into Y?
9
16
7
The domain of the function f(x) = log |4 - x2| is
(-2, 2)
R - {2, -2}
{-2, 2}
The two linear functions which map [-1, 1] on [0,2] are
y = x + 1, y = 1 - x
y = x - 1, -1 - x
y = x, y = -x
y = 1 + 1/x
Given A = { x∈ N : x≤ 4} and B = { y ∈ N: 3 < x ≤ 5}
then n (A×A) =
4
8