{"id":1317,"date":"2014-01-16T20:47:23","date_gmt":"2014-01-16T12:47:23","guid":{"rendered":"https:\/\/2blog.ilc.edu.tw\/2341\/2014\/01\/16\/%e4%b8%89%e8%a7%92%e5%bd%a2%e5%85%a7%e5%bf%83%e5%ba%a7%e6%a8%99\/"},"modified":"2014-01-16T20:47:23","modified_gmt":"2014-01-16T12:47:23","slug":"%e4%b8%89%e8%a7%92%e5%bd%a2%e5%85%a7%e5%bf%83%e5%ba%a7%e6%a8%99","status":"publish","type":"post","link":"https:\/\/2blog.ilc.edu.tw\/2341\/2014\/01\/16\/%e4%b8%89%e8%a7%92%e5%bd%a2%e5%85%a7%e5%bf%83%e5%ba%a7%e6%a8%99\/","title":{"rendered":"\u4e09\u89d2\u5f62\u5167\u5fc3\u5ea7\u6a19"},"content":{"rendered":"

\u82e5\u5ea7\u6a19\u5e73\u9762\u4e0a\u6709 A(-2,10) B(10,5) c(-2,5)\u4e09\u9ede\uff0c\u5167\u5fc3\u5ea7\u6a19\u70ba\u4f55\u5462\uff1f<\/span><\/p>\n

\u9ad8\u4e2d\u53ef\u4ee5\u7528\u5411\u91cf\u6c42\u89e3\uff0c\u7db2\u8def\u4e0a\u7684\u5927\u90e8\u4efd\u89e3\u7b54\u90fd\u662f\u7528\u516c\u5f0f\u5982\u4e0b\uff1a<\/span><\/span><\/p>\n

\u8a2d\u4e09\u89d2\u5f62ABC,A(X1,Y1),B(X2,Y2),C(X3,Y3)<\/span>
\u7dda\u6bb5BC=a,\u7dda\u6bb5AC=b,\u7dda\u6bb5AB=c<\/span>
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\u5167\u5fc3I\u7684Y\u5ea7\u6a19:(aY1+bY2+cY3)\/(a+b+c)<\/span><\/p>\n

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[@more@]<\/p>\n

A\u9ede\u548cC\u9ede\u76f8\u8ddd5\u55ae\u4f4d\u9577\uff1b<\/span>
B\u9ede\u548cC\u9ede\u76f8\u8ddd12\u55ae\u4f4d\u9577\uff1b<\/span>
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BC\u7dda\u6bb5\u9577=x+(7+x)=13<\/span>
2x+7=13<\/span>
2x=6<\/span>
x=3<\/span>
\u4e09\u89d2\u5f62ABC\u5167\u5fc3\u5ea7\u6a19\u70ba(-2+5-x,5+5-x)<\/span>
\u5df2\u6c42\u5c80x=3<\/span>
\u2234\u4e09\u89d2\u5f62ABC\u5167\u5fc3\u5ea7\u6a19\u70ba(0,7)<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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