document.write( "Question 1086405: in a given ellipse, the distance between foci is 2c and between vertices 2a. determine the distance from one of the foci to the nearest vertex \n" ); document.write( "
Algebra.Com's Answer #700616 by Edwin McCravy(20060)\"\" \"About 
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document.write( "The vertices are P and S\r\n" );
document.write( "The foci are Q and R\r\n" );
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document.write( "Given: QR = 2c\r\n" );
document.write( "       PS = 2a\r\n" );
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document.write( "To find: PQ = RS = x\r\n" );
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document.write( "     PS = PQ + QR + RS\r\n" );
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document.write( "     2a =  x + 2c +  x\r\n" );
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document.write( "     2a = 2x + 2c\r\n" );
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document.write( "2a - 2c = 2x\r\n" );
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document.write( "  a - c = x\r\n" );
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document.write( "Answer: a - c\r\n" );
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document.write( "Edwin
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