AnswersPrecalculusLimits and Continuity

Limits and Continuity — Quiz Answers

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1
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For which function and interval can the extreme value theorem be applied?

A
f of x is equal to the fraction with numerator x and denominator open paren x minus 6 close paren squared over the interval left bracket 3 comma 5 right bracket
B
f of x is equal to 4 tangent pi x over the interval left bracket 0 comma 1 right bracket
C
f of x is equal to the fraction with numerator negative 5 and denominator 2 times open paren x minus 7 close paren cubed over the interval open paren 6 comma 8 close paren
D
f of x is equal to 3 e to the x th power plus 1 over the interval open paren 1 comma 3 close paren
2
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Which statement describes whether the extreme value theorem applies?

A
The extreme value theorem does not apply, and f of x does not have a minimum or a maximum.
B
The extreme value theorem applies, and f of x has both a minimum and a maximum.
C
The extreme value theorem applies, and f of x has a maximum but not a minimum.
D
The extreme value theorem does not apply, and f of x has a maximum but not a minimum.
3

Which function has a removable discontinuity at x is equal to 7 ?

A
f of x equals inequality negative x comma x is less than 7 inequality x plus 1 comma x is greater than or equal to 7
B
f of x equals inequality negative the fraction with numerator x and denominator x minus 7 comma x is less than 7 inequality x plus 1 comma x is greater than or equal to 7
C
f of x is equal to the fraction with numerator x squared minus 10 x plus 21 and denominator x minus 7
D
f of x is equal to the fraction with numerator 3 and denominator x minus 7
6

Function f of x is equal to the fraction with numerator 25 x and denominator x plus 3 has a discontinuity at x is equal to negative 3 What are the limits? limit x to negative 3 raised to the negative power of f times x and limit x to negative 3 raised to the plus power of f times x

A
limit x to negative 3 raised to the negative power of f times x is equal to infinity limit x to negative 3 raised to the plus power of f times x is equal to negative infinity
B
limit x to negative 3 raised to the negative power of f times x is equal to infinity limit x to negative 3 raised to the plus power of f times x is equal to infinity
C
limit x to negative 3 raised to the negative power of f times x is equal to negative infinity limit x to negative 3 raised to the plus power of f times x is equal to infinity
D
limit x to negative 3 raised to the negative power of f times x is equal to negative infinity limit x to negative 3 raised to the plus power of f times x is equal to negative infinity
7

Function f of x has a jump discontinuity at x is equal to 8 Which statement identifies possible one-sided limits at x is equal to 8 ?

A
limit x to 8 raised to the negative power of f x DNE and limit x to 8 raised to the plus power of f times x is equal to 120
B
limit x to 8 raised to the negative power of f x DNE and limit x to 8 raised to the plus power of f x DNE
C
limit x to 8 raised to the negative power of f times x is equal to 85 and limit x to 8 raised to the plus power of f times x is equal to 120
D
limit x to 8 raised to the negative power of f times x is equal to 85 and limit x to 8 raised to the plus power of f times x is equal to 85
8

Which function is continuous at x is equal to negative 4 ?

A
g of x equals inequality x squared minus 4 comma x is less than negative 4 inequality 5 x comma x is greater than or equal to negative 4
B
g of x is equal to the fraction with numerator open paren x plus 8 close paren times open paren x plus 4 close paren and denominator x plus 4
C
g of x equals inequality x squared comma x is less than negative 4 inequality negative 4 x comma x is greater than or equal to negative 4
D
g of x is equal to the fraction with numerator x and denominator open paren x plus 4 close paren squared
10

Using the extreme value theorem, which graph has a maximum of 5 and minimum of negative 3 ?

A
Image with description On a coordinate plane, a curve starts at closed circle (negative 2, negative 3), curves up to (1, 0.5), curves down through (0, negative 1) to (0.5, negative 1.75), and curves up to closed circle (2, 5).
B
Image with description On a coordinate plane, a curve starts at closed circle (negative 1, negative 3) and curves up and approaches the y-axis in quadrant 2. A curve starts at closed circle (2, 5) and curves up and approaches x = 1 in quadrant 1.
C
Image with description On a coordinate plane, a curve starts at closed circle (negative 4, negative 3), curves up to (1.5, 7.5) and curves down to closed circle (4, 5).
D
Image with description On a coordinate plane, a line starts at closed circle (negative 3, negative 3) and goes to closed circle (5, 1).

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