Given f: N→N, If f={(1,3) (2,5) (3,7).........} then f(x)=
2x + 1
2x - 1
x + 1
x - 1
Given A = {x∈ N : x≤ 4} and B = {y ∈ N: 3< y ≤ 5} then n(A × A) =
4
8
16
0
Given A = { x∈ N : x≤ 4} and B = { y ∈ N: 3<y<6}then n (A×A) =
f(a2)
f(a)
f(a+1)
None of these
If f(x) = x2-5x+3, then f(1) =
3
1
-1
The inverse function of logex is
10x
10-x
ex
e-x
Cot θ
- Cot θ
-tan θ
- sin θ
If f(x) = x2 - 1/x2, f(x) =
-f(1/x)
f(1/x)
-f(x)
f(x2)
If A = {4,5,7} B = { 2,4} and C = {2,3,7} then (A-B) x(A-C) =
{(5,4) (5,5) (7,4) (7,5)}
{(5,5) (5,6) (7,5) (7,6)}
{(4,5) (5,5) (7,3) (7,7)}
None
