
Concept explainers
(a)
To find: all the real zeros of the given function.
(a)

Answer to Problem 44E
The real zeros are x=0,−5,6
Explanation of Solution
Given information:
Consider f(x)=x4−x3−30x2
Calculation:
Find the zero’s of the given function
The function
f(x)=x4−x3−30x2=0x2(x2−x−30)=0x2=0⇒x=0,0x2−x−30=0⇒(x−6)(x+5)=0x=−5,6
Hence, the real zeros are x=0,−5,6
(b)
To find: whether the multiplicity of the each zero of the given function is even or odd .
(b)

Answer to Problem 44E
Multiplicity of x=0 is even and
Multiplicity of x=−5,6 is odd.
Explanation of Solution
Given information:
Consider f(x)=x4−x3−30x2
Calculation:
From part a,
The real zeros are x=0,−5,6
Multiplicity of x=0 is =2
Multiplicity of x=−5,6 is =1
Hence, Multiplicity of x=0 is even and
Multiplicity of x=−5,6 is odd.
(c)
To find: the maximum possible number of turning points of the given function.
(c)

Answer to Problem 44E
The maximum number of turning points =3
Explanation of Solution
Given information:
Consider f(x)=x4−x3−30x2
Calculation:
The maximum number of turning points is one less than the degree of the function
Degree of the function is =4
Hence, the maximum number of turning points =3
(d)
To plot: the given function and to verify the results of previous parts.
(d)

Explanation of Solution
Given information:
Consider f(x)=x4−x3−30x2
Graph:
The graph of the f(x)=x4−x3−30x2 is shown below
Hence, the results of previous parts are correct from the graph.
Chapter 2 Solutions
Precalculus with Limits
- quick solve thisarrow_forwardquick solve thisarrow_forwardThis table displays the current in equal intervals. Time t/ms 05 10 15 20 25 30 Current i/A 0 4.8 9.1 12.7 8.8 3.5 0 The formula for the charge as follows: 30x10-3 q 0 i dt Use formula to solve the current at 30ms using both the trapezoidal rule and Simpson's rule showing all steps and workingarrow_forward
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning





