Find the derivative of the function.y = e-3x cos x
A. 
= e-3x(3cos x - sin x)
B. 
= e-3x(-3cos x + sin x)
C. 
= e-3x(-3cos x - sin x)
D. 
= e-3x(3cos x + sin x)
Answer: C
Mathematics
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Construct a truth table for the statement.(t ? p) ? (~t ? ~p)
A. 
| T | T | F |
F T T
F F T
B.
| T | F | F |
C.
| T | T | T |
F T F
F F T
D.
| T | T | T |
F T T
F F F
Mathematics
Find the extreme values of the function subject to the given constraint.
A. Maximum: 8 at 
minimum: -8 at 
B. Maximum: 8 at 
minimum: -4 at 
C. Maximum: 4 at 
minimum: -4 at 
D. Maximum: 4 at 
minimum: -8 at 
Mathematics
Factor completely. If the polynomial is prime, say so.81x2 - 49
A. Prime B. (9x - 7)2 C. (9x + 7)2 D. (9x + 7)(9x - 7)
Mathematics
Find the sum.20 + (-20)
A. 40 B. -40 C. 0 D. -20
Mathematics