Teb: Qhov Yuav Tsum Tau Ua piv txwv yog 2:9 thiab tus nqi ntawm y yog -4/11…..
Yuav ua li cas piv rau qhov point 11 24 Y faib kab segment koom nrog cov ntsiab lus P 2 − 2 thiab Q 3 7)? Kuj pom tus nqi ntawm y?
Keem nrhiav tus nqi ntawm. Muab: Point (24 11, y) faib cov kab segment koom nrog cov ntsiab lus P (2, − 2) thiab Q (3, 7). Ua: txhawm rau nrhiav qhov sib faib thiab tus nqi ntawm. Li no, lub ntsiab lus muab faib cov kab ntu hauv qhov piv thiab y=− 4 11.
Dab tsi yog qhov piv txwv?
Hauv lej, tus piv qhia tias pes tsawg zaus ib tus lej muaj lwm tus. Piv txwv li, yog tias muaj yim txiv kab ntxwv thiab rau txiv qaub nyob rau hauv ib lub tais ntawm txiv hmab txiv ntoo, ces qhov piv ntawm txiv kab ntxwv rau txiv qaub yog yim mus rau rau (uas yog, 8∶6, uas yog sib npaug rau qhov piv ntawm 4∶3).
C 3 5 11 5 piv li cas?
Yog li ntawd, qhov xav tau piv yog sib npaug 2: 3.
Yuav ua li cas piv qhov point 2 y faib cov kab koom nrog cov ntsiab lus 4 3 thiab 6'3)? Nrhiav tus nqi ntawm y?
Then, 2=6k-4×1/k+1 ⇒ k= 3/2. y=3 × 3 + 2 × 3 / 3 + 2=3.