Determine the domain and the range of the function.f(x) = x2 + 4x
A. domain: all real numbers
range: {y|y ? 4}
B. domain: all real numbers
range: {y|y ? -4}
C. domain: {x|x ? 2}
range: {y|y ? 4}
D. domain: {x|x ? -2}
range: {y|y ? -4}
Answer: B
Mathematics
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+ y = cos ?; ? > 0, y(?) = 1
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÷ - 
A. - 
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C. 
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3
A. 
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