document.write( "Question 1182908: Given that f : x maps to ax + b and f^3 : x maps to 27x + 26, Find the value of a and of b, Find an expression for f^4 \n" ); document.write( "
Algebra.Com's Answer #813016 by robertb(5830)\"\" \"About 
You can put this solution on YOUR website!
Ikleyn's solution is correct, except for the last line, where it should read \r
\n" ); document.write( "\n" ); document.write( " f^4(x) = 27(3x+2) + 26 = 81x + 54 + 26 = 81x + 80.
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