
Concept explainers
To find:how many positive and how many negative real zeros the polynomial have using Descartes’s rule of sign and determine the possible total number of real zeros.

Answer to Problem 69E
The polynomial has either two or 0 positive and0 negative zeros and total number ofeither two or 0real zeros .
Explanation of Solution
Given information:
The polynomial is
Concept used: Descartes’s rule of signs:
Let P be a polynomial with real coef?cients.
1. The number of positive real zeros of
2. The number of negative real zeros of
Calculation:
The polynomial has two variation in sign, so it has either two or 0 positive zeros, now
So,
Thus,
Chapter 3 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
- Prove that if a and b are both positive, then y(x)⭢0 as x⭢∞ for all sloutions y of the questionarrow_forwardShow how to use "Change of Variables Formula for Integrals" to solve "Separable Differential Equations"arrow_forwardUse the two methods "real number solution space basis" and "complex solution space basis" respectively to solve y''+ 4y' + 4y = 0, y(-1) = 2, y'(-1) = 1arrow_forward
- Explain the key points of Theroem 9.3.6arrow_forwardUse the two methods "real number solution space basis" and "complex solution space basis" respectively to solve y''+ 4y' + 4y = 0, y(-1) = 2, y'(-1) = 1arrow_forwardShow how to use "Change of Variables Formula for Integrals" to solve "Separable Differential Equations"arrow_forward
- A helicopter pilot needs to travel to a regional airport 25 miles away. She flies at an actual heading of N16.26°E with an airspeed of 110 mph, and there is a wind blowing directly east at 20 mph. (a) Determine the compass heading that the pilot needs to reach her destination. (b) How long will it take her to reach her destination?arrow_forwardQuestion 3. the given integral is convergent or divergent: Use the comparison test to determine whether or not * sin*(x + 1) 7x3 (a) |. d.x g8 + x4 + 1 -dx (b) 2.x4 + x + 1arrow_forward-d.x tan xarrow_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





