# Punjab -> 12th Class -> Math -> Functions and Limits MCQs

Question:

## If f(x) = 2x + 3, g(x) = x power 2 − 1 , then (gog)(x) =

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A: 2x power 2 − 1
B: 4x power 2 + 4x
C: 4x + 3
D: x power 4 − 2x power 2 Hamyal
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Question:

### The notation y = f(x) was invented by

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A: Lebnitz
B: Euler
C: Newton
D: Lagrange Hamyal
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Question:

### The inverse of a function exists only if it is

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A: an into function
B: an onto function
C: (1-1) and into function
D: None of these Hamyal
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Question:

### The function of the form x = acost ; y = bsint

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A: Odd function
B: Explicit function
C: Parametric function
D: Even function Hamyal
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Question:

### If y is expressed in terms of a variable x as y = f(x), then y is called

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A: An explicit function
B: An implicit function
C: A linear function
D: An identity function Hamyal
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Question:

### If y = cosecx , domain = {x|x ∈ R, x = nπ , n integer} then range is

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A: y ≥ 1, y ≤ −1
B: y ≤ 1, y ≥ −1
C: y < 1, y > −1
D: all real numbers Hamyal
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Question:

### The function , f(x) = Sinx + Cosx is

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A: Even
B: Odd
C: Neither
D: None of these Hamyal
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Question:

### If a graph express a function , then a vertical line must cut the graph at

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A: One point only
B: Two points
C: More than one point
D: No point Hamyal
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Question:

### The graph of linear equation is always a

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A: Straight line
B: parabola
C: circle
D: cube Hamyal
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Question:

### The term Function was recognized by______ to describe the dependence of one quantity to another.

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A: Lebnitz
B: Euler
C: Newton
D: Lagrange Hamyal
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Question:

### x power 2 + xy + y power 2 = 2 is an example of

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A: Linear function Hamyal