Easy Pre-calculus Questions!!?

rdubhereiam

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The range of the function f(x) = 3^x is
A) All real numbers
B) all real numbers greater than 3
C) all real numbers less than 3
D) all real numbers greater than zero
E) all real numbers less than 0

2) The domain of the function f(x) = log(x+2) is the set of:
A) all real numbers
B) all real numbers greater than 2
C) all real numbers except 2
D) all real numbers except -2
E) all real numbers greater than -2

3.) Write the following expression in terms of the logarithms of x, y, and z:
logb ( (y)(5sqrt z)/x^3)

4.) Solve for x: log10 (11x) -log10(x+7) = 1
 
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