Show that the function is a solution of the wave equation.w(x, t) = ex - ct
A. No
B. Yes
Answer: B
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Find the area of the shaded part of the figure if a = 13, b = 16.
?
?
A. 416 B. 832 C. 104 D. 29 E. none of these
Find the intervals on which the function is continuous.y = 
A. discontinuous only when ? = -2
B. discontinuous only when ? = 
C. continuous everywhere
D. discontinuous only when ? = 2
Use reduction formulas to evaluate the integral.
A. - 
sin4 5x cos 5x - 
sin2 5x cos 5x - 
sin 10x + 
+ C
B. - 
sin4 5x cos 5x - 
sin2 5x cos 5x - 
cos 5x + C
C. - 
sin4 5x cos 5x - 
sin2 5x cos 5x - 
cos 5x + C
D. - 
cos4 5x sin 5x - 
cos2 5x sin 5x - 
cos 5x + C
Solve the system of equations using substitution.
A. x = 1, y = 4; x = 4, y = 19 or (1, 4), (4, 19) B. x = 2, y = -1; x = -2, y = -1 or (2, -1), (-2, -1) C. x = 2, y = -1; x = 1, y = 2; x = -1, y = 2; x = -2, y = -1 or (2, -1), (1, 2), (-1, 2), (-2, -1) D. x = 1, y = 2; x = -1, y = 2 or (1, 2), (-1, 2)