document.write( "Question 32119: Find the value of k for which the system of linear equations 2x+5y=3 ; (k+1)x+2(k+2)y=2k will have infinite number of solutions . ( Pls answer . .. Its urget ..........THAnkS
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Algebra.Com's Answer #18634 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! For there to be an infinite number of solutions, the \n" ); document.write( "equation (k+1)x+2(k+2)y=2k must be a multiple of \n" ); document.write( "the equation 2x+5y=3 \n" ); document.write( "Let the multiplier by \"a\". \n" ); document.write( "Then the equation is 2ax+5ay=3a \n" ); document.write( "Then the following set of equation must be true: \n" ); document.write( "k+1=2a \n" ); document.write( "2k=3a \n" ); document.write( "Then k=3a/2 \n" ); document.write( "Substitute that into k+1=2a to get: \n" ); document.write( "(3a/2)+1=2a \n" ); document.write( "(1/2)a=1 \n" ); document.write( "a=2 \n" ); document.write( "If a=2 then 2k=3(2) and k=3 \n" ); document.write( "Try It: \n" ); document.write( "Substituting for \"k\" you get: \n" ); document.write( "(3+1)x+2(3+2)y=2(3) \n" ); document.write( "4x+10y=6 \n" ); document.write( "This is a multiple of the equation 2x+5y=3 \n" ); document.write( "Hope this helps. \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |