Finding the Domain and Range of a Function

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Finding the Domain and Range of a Function: Overview

In this topic, we will learn how to find the domain and range of functions. We will come across several examples related to this topic. We can further remember some basic conditions to find the range of a function.

Important Questions on Finding the Domain and Range of a Function

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Find the domain of the following function loge2+x2-x.

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Find the domain of the following function sin-1log2x22.

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Find the domain of the following function fx=11-xx-2.

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Show that the function x2+3x+5x2-5x+4 is undefined at x=1 and x=4, and sinxx is undefined at x=0.

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Find the values of θ for which the function f(θ)=sinθcosθ-sinθ is not defined.

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Find the domain of the function f(x)=x-1+6-x.

HARD
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If f(x)=15+x-2x2, find the domain of definition of f(x). If possible, find the values of f(0), f(4) and f-2.

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Find the range of g(x)=sinx+cosx.

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Find the range of values of x for the following function.

f(x)=x2-2x-3

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Find the range of values of x for the following function.

f(x)=8+2x-3x2

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Find the range of values of x for the following function.

f(x)=x2-4

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Find the domain of the definition of the following function.

f(x)=1x-2

EASY
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Find the domain of the definition of the following function.

f(x)=3x

EASY
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Find the domain of the definition of the following function.

f(x)=x2

EASY
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A function f is completely defined by the following table. Find the domain of definition of f. What is its range ?

x 2 3 4 5
y 3 5 5 6

 

EASY
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A function f is completely defined by the following table. Find the domain of definition of f. What is its range ?

x 1 2 4
y 0 1 3

 

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The arrow diagram shown alongside represents part of the graph of y, a linear function of x. Determine this function. A further arrow is to be drawn at x=3. At what point should this arrow terminate ? If the function f is such that f : ZZ, where Z is a set of integers, determine the range of f if the domain of f is from -4 to 3.

Question Image .

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Find the range of the function fx=x1+x2, xR where R is the set of real numbers,

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If f:RR is a function defined by fx=x21+x2, xR where R is the set of real numbers, find the range of x.

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The domain of the function fx=sin-1log4x4+17x-x2-16 is