Simplify the radical expression. Assume all variables represent positive real numbers.
A. 6561
B. 9
C. 
D. not a real number
Answer: B
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Find the indicated probability.f(x) = 
e-x/3; [0, ?), P(2 ? x ? 6)
A. 0.1260 B. 0.3781 C. 0.0630 D. 0.0840
Using a sum or difference identity, write the following as an expression involving functions of ?.sin (360° + ?)
A. sin ?
B. -cos ?
C. 
cos ? - 
sin ?
D. 
cos ? + 
sin ?
A function f is continuous at the point 
if the following conditions are satisfied.
?
1. 
is defined.
2. 
exists.
3. 
.
?
Determine the values of x, if any, at which the function is discontinuous. At each point of discontinuity, state the condition(s) for continuity that are violated.
?
?
?
A. 
; conditions 1, 2
B. 
; conditions 2, 3
C. 
; conditions 1, 2
D. 
; condition 2
E. Continuous everywhere.
Compute the quadratic form xTAx for the given matrix A and vector x.A = 
, x = 
A. 2x1 - 9x2
B. 2
- 9
C. 4x1 - 18x2
D. -9
+ 2