document.write( "Question 1153796: Suppose g is an exponential function and g(2)=10 and g(3)=19. Write a function formula for g. \n" ); document.write( "
Algebra.Com's Answer #776091 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "\"g%28x%29+=+a%2Ab%5Ex%29\"

\n" ); document.write( "g(2) = 10 --> \"ab%5E2+=+10\" [1]
\n" ); document.write( "g(3) = 19 --> \"ab%5E3+=+19\" [2]

\n" ); document.write( "Divide [2] by [1]: \"b+=+19%2F10+=+1.9\"

\n" ); document.write( "We could plug that value of b in [1] to find the value of a:

\n" ); document.write( "\"a%2819%2F10%29%5E2+=+10\"
\n" ); document.write( "\"a+=+10%2F%28361%2F100%29+=+1000%2F361\"

\n" ); document.write( "The function is then

\n" ); document.write( "\"g%28x%29+=+%281000%2F361%29%2819%2F10%29%5Ex\"

\n" ); document.write( "It is probably \"nicer\" if we use x=2 for the \"reference point\"; that will give us the equivalent function

\n" ); document.write( "\"g%28x%29+=+10%2A%2819%2F10%29%5E%28x-2%29\"
\n" ); document.write( "or
\n" ); document.write( "\"g%28x%29+=+10%2A1.9%5E%28x-2%29\"

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