document.write( "Question 412623: How to find the domain of f(x)=log(x+9) \n" ); document.write( "
Algebra.Com's Answer #289791 by nerdybill(7384)\"\" \"About 
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How to find the domain of f(x)=log(x+9)
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\n" ); document.write( "Domain defines the valid values that x can take.
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\n" ); document.write( "Since you cannot take a log of a negative number
\n" ); document.write( "this means
\n" ); document.write( "(x+9) >= 0
\n" ); document.write( "x >= -9
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\n" ); document.write( "x has to greater than or equal to -9
\n" ); document.write( "sometimes written as:
\n" ); document.write( "[-9, oo)
\n" ); document.write( "where oo denotes infinity
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\n" ); document.write( "Or,
\n" ); document.write( "{x | x >= -9}\r
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