document.write( "Question 840375: If f(n)=158, what is n \n" ); document.write( "
Algebra.Com's Answer #506150 by richard1234(7193)\"\" \"About 
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How are we supposed to know, given that you didn't provide any information whatsoever about f, other than there is some element n such that f(n) = 158? \n" ); document.write( "
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