If f(x) = x2 - 1/x2, f(x) =
-f(1/x)
f(1/x)
-f(x)
f(x2)
The inverse function of logex is
10x
10-x
ex
e-x
Let X = {2,3} and Y = {1,3,5}. How many different functions are there from X into Y?
3
9
16
19
Given A = {x∈ N : x≤ 4} and B = {y ∈ N: 3< y ≤ 5} then n(A × A) =
4
8
0
The domain of sin-1 [log3(x/3)] is
[1,9]
(-1,9)
(-9,1)
(-9,-1)
If f(x) = x2-5x+3, then f(1) =
1
-1
The inverse function of f(x) = [1 - (x - 5)3]1/5 is
5 + (1 - x5)1/3
5 - (1 - x2)1/3
-5 + (1 - x5)1/3
None of these
Which of the following function identical?
f(x) = x/x and ∅ (x) = 1
f(x) = logx2 and ∅ (x0 = 2 log x
f(x) = 1 and ∅ (x) = sin2 x + cos2 x
f(x) = x and ∅(x) = (√x)2
Let X = {2,3} and Y = {1,3,5}. How many different functions are there from X and Y?
7
Given A = { x∈ N : x≤ 4} and B = { y ∈ N: 3<y<6}then n (A×A) =