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ចំណេះដឹងមូលដ្ឋាន -វ៉ិចទ័រក្នុងប្លង់-

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០៩២ ៧៧៤៤៤០ ឆន ំសិក ២០១៦-២០១៧<br />

េនះ<br />

1 1 <br />

OR OB ន ិង AR 2AQ<br />

ឬ AQ AR<br />

2<br />

2<br />

ដូចេនះ ផលេធៀប OR : RB 1:1 និង AQ : QR 1:1 ។<br />

៥១. ក). សរេសរសមីករប៉ ៉ ែម៉តៃនបនទ ត់ l<br />

<br />

េយ l កត់ម P េហ ើយ្រសប 3, 2<br />

<br />

េគបន P<br />

P0<br />

tm<br />

<br />

0 1, 2<br />

សមមូល Pxy<br />

, 1, 2t3, 2<br />

m <br />

េគទញបន l<br />

x<br />

13t<br />

: <br />

y<br />

2 2t<br />

t <br />

ដូចេនះ សមីករប៉ ៉ ែម៉តៃនបនទ ត់ l<br />

<br />

គឺ<br />

x<br />

13t<br />

<br />

y<br />

2 2t<br />

ែដល t ។<br />

ខ). សរេសរសមីករទូេទៃនបនទ ត់ l<br />

<br />

x<br />

13t<br />

េយើងមន l : <br />

y<br />

2 2t<br />

<br />

t <br />

<br />

សមមូលនឹង <br />

t<br />

<br />

<br />

x 1<br />

3<br />

y 2<br />

2<br />

េរៀបេរៀងេយ៖ ЯĊŲ Ю₤₣lН₣ Page 93

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