Solve the rational equation.
= 
A. -3
B. 3
C. 1
D. -1
Answer: C
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Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
? y = x2 y = 
A. Since limx?1+ f '(x) = 
while limx?1- f '(x) = 2, f(x) is not differentiable at 
B. Since limx?1+ f '(x) = 
while limx?1- f '(x) = 1, f(x) is not differentiable at 
C. Since limx?1+ f '(x) = 2 while limx?1- f '(x) = 
, f(x) is not differentiable at 
D. Since limx?1+ f '(x) = 2 while limx?1- f '(x) = 2, f(x) is differentiable at 
Answer the question on the order of rational numbers.Order the rational numbers in increasing order;
, 
, 
A. 
, 
, 
B. 
, 
, 
C. 
, 
, 
Decide if the given values of x are solutions to the equation (Y/N).
? 7; x = 5, x = - 7
A. Yes, Yes B. Yes, No C. No, No D. No, Yes
Solve the inequality.-0.9x ? 7.2
A. {x|x ? -0.8} B. {x|x ? -0.8} C. {x|x ? -8} D. {x|x ? -8}