document.write( "Question 468408: Please help me find the domain to this function
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #321422 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! Please help me find the domain to this function \n" ); document.write( "sqrt(x^2-2x-8) \n" ); document.write( ".. \n" ); document.write( "The expression inside a radical must always be ≥0 \n" ); document.write( "x^2-2x-8≥0 \n" ); document.write( "f(x)=(x-4)(x+2)≥0 \n" ); document.write( "If x≥4, f(x)≥0 \n" ); document.write( "If x≤2, f(x)≥0 \n" ); document.write( "If x<4, f(x)<0 \n" ); document.write( "If x>2, f(x)<0 \n" ); document.write( "Domain: (-∞,2] U [4,∞) \n" ); document.write( " |