document.write( "Question 602306: Find the domain of the function f(x) = ln(3x + 36). \n" ); document.write( "
Algebra.Com's Answer #380182 by nerdybill(7384)\"\" \"About 
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Find the domain of the function f(x) = ln(3x + 36).
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\n" ); document.write( "Domain defines all possible values x can take...
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\n" ); document.write( "Since, you can't take ln of a negative number, we have:
\n" ); document.write( "3x + 36 >= 0
\n" ); document.write( "3x >= -36
\n" ); document.write( "x >= -12 (this is your answer)
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\n" ); document.write( "Or, it could be written as:
\n" ); document.write( "[-12, +oo)
\n" ); document.write( "where +oo means positive infinity
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