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 < x ≤ 5}
then n (A×A) =
4
8
16
0
The domain of sin-1 [log3(x/3)] is
[1, 9]
(-1, 9)
(-9, 1)
(-9, -1)
Let X = {2,3} and Y = {1,3,5}. How many different functions are there from X into Y?
3
9
7
If f1(x) and f2 (x) are defined on domain D1 and D2, then the domain of f1(x) + f2 (x) is
D1 ∪ D2
D1 ∩ D2
D1 - D2
D2 - D1
f(a2)
f(a)
f(a+1)
None of these
If f: R→ R, the range of the function f(x) = x2/x2+1, is
R-
R+
R x R
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
The period of f(x) = sin4x + cos4x is
π
2π
π/2
4π
The domain of the function f(x) = log |4 - x2| is
(-2, 2)
R - {2, -2}
{-2, 2}
