document.write( "Question 593910: Give an equation of the form f(x)=a^x to define the exponential function whose graph contains the point (4,81). \n" ); document.write( "
Algebra.Com's Answer #376524 by jim_thompson5910(35256)\"\" \"About 
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\"f%28x%29=a%5Ex\"\r
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\n" ); document.write( "\n" ); document.write( "\"81=a%5E4\"\r
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\n" ); document.write( "\n" ); document.write( "\"root%284%2C81%29=a\"\r
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\n" ); document.write( "\n" ); document.write( "\"3=a\"\r
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\n" ); document.write( "\n" ); document.write( "Answer: The equation is \"f%28x%29+=+3%5Ex\"\r
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