Determine whether the equation defines y as a function of x. x2 - 4y2 = 1
A. function
B. not a function
Answer: B
Mathematics
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Find the domain of the function.f(x) = 
A. {x|x ? 25} B. {x|x ? 5} C. {x|x ? 5} D. {x|x ? 25}
Mathematics
Let A = {1, 3, 5, 7}; B = {5, 6, 7, 8}; C = {5, 8}; 
and 
Determine whether the given statement is true or false.U ? A
A. True B. False
Mathematics
Decide on a suitable restriction on the domain so that the function is one-to-one and the range is not changed.f(x) = (x + 20)2
A. [20, ?) B. (-20, 19) C. [-20, ?) D. [-20, 20)
Mathematics
Match the equation to one of the curves (for x ? 0).f(x) = 
x-5
A. 
B. 
C. 
D. 
Mathematics