Find all values for which at least one denominator is equal to 0. Write answers using the symbol ?. Do not solve.
- 
= 0
A. x ?5, 6
B. x ? -5, -6, -8, -18
C. x ? -5, -6
D. x ? 5, 6, 8, 18
Answer: A
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For the following rational function, identify the coordinates of all removable discontinuities and sketch the graph. Identify all intercepts and find the equations of all asymptotes.f(x) = 
A. removable discontinuity at 
;
x-intercept: (3, 0), y-intercept: 
;
asymptotes: x = -5, y = 1
B. removable discontinuity at (-3, 0);
x-intercept: (-3, 0), y-intercept: 
;
asymptotes: x = -5, y = 1
C. removable discontinuities: 
, (-3, 0);
x-intercept: (-3, 0), y-intercept: 
;
asymptotes: x = 5, y = 1
D. removable discontinuities: 
, 
;
x-intercept: (3, 0), y-intercept: 
;
asymptotes: x = 5, y = 1
Perform the indicated elementary row operations in the stated order.
; 
A. 
B. 
C. 
D. 
Find all numbers that must be excluded from the domain of the rational expression.
A. x ? 2 B. x ? 2, x ? -2 C. x ? 4 D. x ? -7
Graph the function. State whether it is increasing, decreasing, or constant..p(x) = -x - 4
A. decreasing
B. decreasing
C. increasing
D. increasing