document.write( "Question 1181119: Dear Sir,\r
\n" ); document.write( "\n" ); document.write( "Please help me solve this problem showing your solution.\r
\n" ); document.write( "\n" ); document.write( "Find the equation if the ellipse with center at (2, 3), vertices at (2, 9) and (2, −3), and eccentricity of 2/3. Identify the parts of the ellipse and sketch the graph.\r
\n" ); document.write( "\n" ); document.write( "Please help me also to identify the parts of the Ellipse and its sketch.\r
\n" ); document.write( "\n" ); document.write( "Parts of an Ellipse
\n" ); document.write( "1. Center
\n" ); document.write( "2. Foci
\n" ); document.write( "𝐹1
\n" ); document.write( "𝐹2
\n" ); document.write( "3. Vertices
\n" ); document.write( "𝑉1
\n" ); document.write( "𝑉2
\n" ); document.write( "4. Co-vertices
\n" ); document.write( "𝐵1
\n" ); document.write( "𝐵2
\n" ); document.write( "5. Endpoints of Latus
\n" ); document.write( "Rectum
\n" ); document.write( "𝐸1
\n" ); document.write( "𝐸2
\n" ); document.write( "𝐸3
\n" ); document.write( "𝐸4
\n" ); document.write( "6. Directrices
\n" ); document.write( "7. Eccentricity
\n" ); document.write( "8. Length of LR
\n" ); document.write( "9. Length of Major Axis
\n" ); document.write( "10.Length of Minor Axis\r
\n" ); document.write( "\n" ); document.write( "Thank you very much and God bless you.\r
\n" ); document.write( "\n" ); document.write( "Lorna
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Algebra.Com's Answer #810986 by MathLover1(20849)\"\" \"About 
You can put this solution on YOUR website!
the equation of the ellipse\r
\n" ); document.write( "\n" ); document.write( "\"%28x-h%29%5E2%2Fa%5E2%2B%28y-k%29%5E2%2Fb%5E2=1\"\r
\n" ); document.write( "\n" ); document.write( "given:
\n" ); document.write( "center at (\"2\", \"3\"), \r
\n" ); document.write( "\n" ); document.write( "since center is at (\"h\", \"k\")=>\"h=2\", \"k=3\"
\n" ); document.write( "vertices at (\"2\", \"9\") and (\"2\", \"-3\"),\r
\n" ); document.write( "\n" ); document.write( "since vertices at (\"h\", \"k%2Bb\"), (\"h\", \"k-b\")
\n" ); document.write( "\"3%2Bb=9\"=>\"b=6\"
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\n" ); document.write( "=> since \"x\" coordinates same, major axis parallel \"y\" axis, and you have vertical ellipse\r
\n" ); document.write( "\n" ); document.write( " eccentricity of \"2%2F3\"\r
\n" ); document.write( "\n" ); document.write( "\"e=sqrt%28b%5E2-a%5E2%29%2Fb+\"
\n" ); document.write( "\"2%2F3=sqrt%286%5E2-a%5E2%29%2F6\"
\n" ); document.write( "\"%282%2F3%29%5E2=%2836-a%5E2%29%2F6%5E2\"
\n" ); document.write( "\"%284%2F9%2936=%2836-a%5E2%29\"
\n" ); document.write( "\"%284%2F1%294=36-a%5E2\"
\n" ); document.write( "\"16=36-a%5E2\"
\n" ); document.write( "\"a%5E2=36-16\"
\n" ); document.write( "\"a%5E2=20\"
\n" ); document.write( "\"a=sqrt%2820%29\"
\n" ); document.write( "\"a=sqrt%284%2A5%29\"
\n" ); document.write( "\"a=2sqrt%285%29\"\r
\n" ); document.write( "\n" ); document.write( "\"c=sqrt%28b%5E2-a%5E2%29\"
\n" ); document.write( "\"c=sqrt%2836%2B20%29\"
\n" ); document.write( "\"c=sqrt%2816%29\"
\n" ); document.write( "\"c=4\"\r
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\n" ); document.write( "\n" ); document.write( "so, your equation is\r
\n" ); document.write( "\n" ); document.write( "\"%28x-2%29%5E2%2F20%2B%28y-3%29%5E2%2F36=1\"\r
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\n" ); document.write( "\n" ); document.write( "1. Center:(\"2\", \"3\")
\n" ); document.write( "2. Foci: (\"h\", \"k%2Bc\" ), (\"h\",\"+k-c\" )
\n" ); document.write( "𝐹1 (\"2\", \"3%2B4\" ) =>(\"2\", \"7\" )
\n" ); document.write( "𝐹2 (\"2\", \"3-4\" ) =>(\"2\", \"-1\" )\r
\n" ); document.write( "\n" ); document.write( "3. Vertices: (\"h\", \"k%2Bb\" ), (\"h\",\"+k-b\" )\r
\n" ); document.write( "\n" ); document.write( "𝑉1 (\"2\", \"3%2B6\" ) =>(\"2\", \"9\" )
\n" ); document.write( "𝑉2(\"2\",\"+3-6\" ) =>(\"2\", \"-3\" )\r
\n" ); document.write( "\n" ); document.write( "4. Co-vertices (\"h%2Ba\", \"k\" ), (\"h-a\",\"+k\" )\r
\n" ); document.write( "\n" ); document.write( "𝐵1(\"2%2B2sqrt%285%29\", \"3\" )=>(\"6.5\", \"3\" )\r
\n" ); document.write( "\n" ); document.write( "𝐵2(\"2-2sqrt%285%29\", \"3\" )=>(\"-2.5\", \"3\" )\r
\n" ); document.write( "\n" ); document.write( "5. Endpoints of Latus Rectum\r
\n" ); document.write( "\n" ); document.write( "foci is (\"2\", \"7\" ), endpoints E1 and E2 lie on a line \"y=7\"\r
\n" ); document.write( "\n" ); document.write( "substitute in equation of ellipse to calculate \"x\" coordinates\r
\n" ); document.write( "\n" ); document.write( "\"%28x-2%29%5E2%2F20%2B%287-3%29%5E2%2F36=1\"...solve it and you will get\r
\n" ); document.write( "\n" ); document.write( "\"x+=+-4%2F3\" and \"x+=+16%2F3\"\r
\n" ); document.write( "\n" ); document.write( "so,
\n" ); document.write( "E1 (\"-4%2F3\", \"7\")\r
\n" ); document.write( "\n" ); document.write( "E2(\"16%2F3\", \"7\")\r
\n" ); document.write( "\n" ); document.write( "other focus is at (\"2\", \"-1\" ),endpoints Ee and E4 lie on a line \"y=-1\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+-4%2F3\" and \"x+=+16%2F3\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "E3 =>(\"-4%2F3\", \"-1\")\r
\n" ); document.write( "\n" ); document.write( "E4 =>(\"16%2F3\",\"-1\")\r
\n" ); document.write( "\n" ); document.write( "6. Directrices: \"y=-6\", \"y=12\"}\r
\n" ); document.write( "\n" ); document.write( "7. Eccentricity:\"2%2F3\"\r
\n" ); document.write( "\n" ); document.write( "8. Length of LR: \"a%5E2%2Fk=20%2F3\"\"6.66666666666667\"\r
\n" ); document.write( "\n" ); document.write( "9. Length of Major Axis:\"12\"\r
\n" ); document.write( "\n" ); document.write( "10.Length of Minor Axis:\"2%2A2sqrt%285%29=4sqrt%285%29=8.9\"\r
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