Determine the continuity of the function fx=x3-x
Question
Determine the continuity of the function fx=x3-x
Solution
To determine the continuity of the function f(x) = x^3 - x, we need to check three conditions:
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The function is defined for all real numbers. In this case, the function f(x) = x^3 - x is a polynomial, and polynomials are defined for all real numbers.
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The limit of the function as x approaches a certain value from the left (denoted as x->a-) is equal to the limit of the function as x approaches that value from the right (denoted as x->a+). For all real numbers a, the limit as x approaches a from the left and right for the function f(x) = x^3 - x is the same, because the function is a polynomial and polynomials are continuous everywhere.
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The limit of the function as x approaches a certain value is equal to the value of the function at that point. For all real numbers a, the limit as x approaches a for the function f(x) = x^3 - x is equal to f(a), because the function is a polynomial and polynomials are continuous everywhere.
Therefore, the function f(x) = x^3 - x is continuous for all real numbers.
Similar Questions
Check the continuity of the function f(x) = 3x - 7 at x = 7
Determine the continuity of the function 𝑓𝑥=𝑥3-𝑥
Which function has a discontinuity at x=3?Responsesf(x)={3x+1 for x<3x2+1 for x≥3𝑓(𝑥)={3𝑥+1 𝑓𝑜𝑟 𝑥<3𝑥2+1 𝑓𝑜𝑟 𝑥≥3f(x)={3x+1 for x<3x2+1 for x≥3𝑓(𝑥)={3𝑥+1 𝑓𝑜𝑟 𝑥<3𝑥2+1 𝑓𝑜𝑟 𝑥≥3f(x)=|x−3|+2𝑓(𝑥)=|𝑥−3|+2f of x is equal to start absolute value x minus 3 end absolute value plus 2f(x)=x−3x2𝑓(𝑥)=𝑥−3𝑥2f of x is equal to the fraction with numerator x minus 3 and denominator x squaredf(x)=x+2x2−9
From the graph of f, state each x-value at which f is discontinuous. For each x-value, determine whether f is continuous from the right, or from the left, or neither. (Enter your answers from smallest to largest.)x = (smallest value)continuous from the rightcontinuous from the left neitherx = continuous from the rightcontinuous from the left neitherx = continuous from the rightcontinuous from the left neitherx = (largest value)continuous from the rightcontinuous from the left neither
Determine the value of ‘k’ for which the following function is continuous at x = 3: (All India 2017)
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