Use Descartes' Rule of Signs to determine the possible number of positive and negative real zeros for the function. Then, use a graph to determine the actual number of positive and negative real zeros.P(x) = x7 + x4 + x2 + x + 8
A. possible: 1 or 3 pos, 0 neg
actual: 1 pos, 0 neg
B. possible: 0 pos, 1 neg
actual: 0 pos, 1 neg
C. possible: 0 pos, 1 or 3 neg
actual: 0 pos, 1 neg
D. possible: 0 pos, 2 or 0 neg
actual: 1 pos, 0 neg
Answer: C
Mathematics
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Evaluate the integral.
A. 10 cosh (4x - 2) + C
B. 
cosh (4x - 2) + C
C. 
cosh 4x + C
D. 40 cosh (4x - 2) + C
Mathematics
Evaluate the double integral.
A. 
(1 - cos 81)
B. 
cos 81
C. 
cos 81
D. 
(1 - cos 81)
Mathematics
Decide whether the relation is a function.?
?
A. Function B. Not a function
Mathematics
Write a system of equations associated with the augmented matrix. Do not try to solve.
A. 7x + 2y + 7z = -2
| 8x | + 3z = 4 |
| 7x | + 8z = 2 |
B. 7x + 2y + 7z = -2
| 8x | + 3z = | 4 |
| 7x + 8y | = | 2 |
C. 7x + 8y + 7z = -2
| 8x | + 2z = 4 |
| 3y + 7z | = 2 |
D. 7x - 2y + 7z = -2
| 8x | + 3z = -4 |
| 7x + 8y | = -2 |
Mathematics