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០៩២ ៧៧៤៤៤០ ឆន ំសិក ២០១៦-២០១៧<br />
៥៨. រកតៃម្ល h<br />
េយ បនទ ត់កត់ម h<br />
,3 , 4,1<br />
នំឱយ D:<br />
ymx b ែដល<br />
<br />
2<br />
D:<br />
y xb<br />
h 4<br />
ែត D កត់ម4,1<br />
<br />
y y 31 2<br />
<br />
4 4<br />
2 1<br />
m x<br />
2 x<br />
1 h h<br />
<br />
D<br />
<br />
2<br />
:1 4b<br />
h 4<br />
សមមូល h 48bh<br />
4<br />
នំឱយ<br />
8<br />
b 1<br />
h 4<br />
2 8<br />
េនះ D: y x1<br />
h4 h4<br />
នំឱយ វុ ិចទ័រ្របប់ទិស u2, h<br />
4<br />
េហើយ បនទ ត់l:7x 9y<br />
19 0<br />
<br />
2x h4 yh12<br />
0<br />
សមមូល <br />
ៃនបនទ ត់D<br />
មនវុ ិចទ័រ្របប់ទិស v 7, 9<br />
<br />
<br />
េយ D l<br />
<br />
េនះ uv<br />
0<br />
សមមូល h <br />
27 9 4 0<br />
នំឱយ 14 9h<br />
36 0 េនះ<br />
h <br />
22<br />
9<br />
េរៀបេរៀងេយ៖ ЯĊŲ Ю₤₣lН₣ Page 101
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