document.write( "Question 280016: THE DISTANCE BETWEEN THE PLANE x + 2y - 2z = 3 and 2x + 4y - 4z = 7 \n" ); document.write( "
Algebra.Com's Answer #203481 by nabla(475)\"\" \"About 
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Note first that they are parallel planes (necessary).\r
\n" ); document.write( "\n" ); document.write( "When y=x=0 in x+2y-2z=3, there exists the point (0,0,-3/2)\r
\n" ); document.write( "\n" ); document.write( "D=|-4*(-3/2)-7|/sqrt(4+32)=1/6\r
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\n" ); document.write( "\n" ); document.write( "It should be clear I skipped a few steps in showing the work, I assume you are able to do it. For more information see:\r
\n" ); document.write( "\n" ); document.write( "http://www.math.ucla.edu/~ronmiech/Calculus_Problems/32A/chap11/section5/718d65/718_65.html
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