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
If f(x) = x2-5x+3, then f(1) =
3
1
0
-1
The two linear functions which map [-1, 1] on [0,2] are
y = x + 1, y = 1 - x
y = x - 1, -1 - x
y = 1 + 1/x
y = x, y = -x
f(a2)
f(a)
f(a+1)
Noneof 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
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
The period of cos(x)2 is
2π
4π2
π2/4
None of these
The inverse function of logex is
10x
10-x
ex
e-x
The period of f(x) = sin4x + cos4x is
π
π/2
4π
The period of f(x) = sin 4x + tan 2x is
