document.write( "Question 1051838: What is the eccentricity 1/3, distance between foci 2? \n" ); document.write( "
Algebra.Com's Answer #667314 by addingup(3677)\"\" \"About 
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an ellipse that has eccentricity 1/3 and you want to find the distance between 2 directrix given that the distance between foci is 2.
\n" ); document.write( "2ae = 2
\n" ); document.write( "2a*1/3 = 2
\n" ); document.write( "2a/3 = 2
\n" ); document.write( "2a = 6
\n" ); document.write( "a = 6/2 = 3
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\n" ); document.write( "diatnce between the directrix =2a/e
\n" ); document.write( "2*3/1/3 = 6/1/3 = 6*3 = 18
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