document.write( "Question 1161350: The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain? \n" ); document.write( "

Algebra.Com's Answer #784860 by MathLover1(20850) $\"\"$ $\"About$

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The range of the function $\"f%28k%29+=+k%5E2+%2B+2k+%2B+1\"$ is { $\"25\"$ , $\"64\"$ }. What is the function’s domain?\r
\n" ); document.write( "\n" ); document.write( " $\"k%5E2+%2B+2k+%2B+1+=+25\"$
\n" ); document.write( " $\"k%5E2+%2B+2k+-+24+=+0\"$
\n" ); document.write( " $\"k%5E2+%2B+2k+-+24+=+0\"$
\n" ); document.write( " $\"%28k+-+4%29+%28k+%2B+6%29+=+0\"$ \r
\n" ); document.write( "\n" ); document.write( "=> $\"k=4\"$ and $\"k=-6\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"k%5E2+%2B+2k+%2B+1+=+64\"$
\n" ); document.write( " $\"k%5E2+%2B+2k+-+63+=+0\"$
\n" ); document.write( " $\"%28k+-+7%29+%28k+%2B+9%29+=+0\"$ \r
\n" ); document.write( "\n" ); document.write( "=> $\"k=7\"$ and $\"k=-9\"$ \r
\n" ); document.write( "\n" ); document.write( " the domain is:{ $\"-9\"$ , $\"-6\"$ , $\"4\"$ , $\"7\"$ }\r
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