Domain of √(2-x) is ______.
( - ∞,2 ]
( 2, ∞)
( - ∞, ∞ )
None of these
Let f: x → y be a function. Then if R ( f ) y,f is said to be ______.
Into function
Onto function
One - one function
The inverse of the function
Domain √(x-1) + √(8 - x) is _______.
[1, 8)
( -8,8)
(1,8 ]
[ 1, 8 ]
Ltx → 2+ [x] is equal to ________.
1
0
2
-1
A function y = f ( x ) is said to even if _______.
f ( - x ) = - f (x )
f ( -x ) = f ( x )
f ( x ) = - f ( x )
f ( x ) = f ( x )
is equal to ________.
A function f : X → X is called an identity function if :
f ( x ) = c , where C is some constant
f (x ) = x
f ( x ) = 1
Let f : A →B and A R and B R be defined by y = f (x ), where x A, Y B, then f is called ______.
Real function
One - One function
None
If f1 (x ) and f2 (x ) are defined on domains D1 and D2 respectively; then the domain of f1 ( x ) + f2 (x ) is _______.
D1 - D2
D1 ∩ D2
D1 D2
D2 - D1