document.write( "Question 1198249: If f(1)=9 and f(n)=-3f(n-1)+n then find the value of f(5) \n" ); document.write( "

Algebra.Com's Answer #831809 by ikleyn(52788) $\"\"$ $\"About$

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\n" ); document.write( "If f(1)=9 and f(n)=-3f(n-1)+n then find the value of f(5)
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\n" ); document.write( "\n" ); document.write( "            Calculations made by @ewatrrr in her post all are incorrect.\r
\n" ); document.write( "\n" ); document.write( "            So I came to make it in a right way.\r
\n" ); document.write( "\n" ); document.write( "            Simply do it step by step.\r
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document.write( "f(2) = -3f(1) + 2 = -3*9 + 2      =  -25\r\n" );
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document.write( "f(3) = -3f(2) + 3 = -3*(-25) + 3  =   78\r\n" );
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document.write( "f(4) = -3f(3) + 4 = -3*78 + 4     = -230\r\n" );
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document.write( "f(5) = -3f(4) + 5 = -3*(-230) + 5 =  695\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved (correctly).\r
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\n" ); document.write( "\n" ); document.write( "@ewatrrr re-wrote her post after seeing my calcs.\r
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