Video: Koj pom qhov piv txwv li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txoj kev nrhiav ib txhais tau tias proportional yog muab ob tug lej ua ke, ces nrhiav lawv lub hauv paus square. Qhov ntawd yuav yog txhais tau tias proportional.
Ntxiv mus, dab tsi yog tus qauv ntawm qhov kev faib ua feem?
Cov txhais tau tias proportional nruab nrab ntawm ob nqe lus ntawm ib qho piv txwv hauv a proportional yog lub hauv paus square ntawm cov khoom ntawm ob. Piv txwv li, nyob rau hauv lub kev faib ua feem a:b::c:d, peb tuaj yeem txhais qhov txhais tau tias proportional rau qhov ratio a:b raws li lub hauv paus square ntawm cov khoom ntawm ob nqe lus ntawm tus piv los yog √ab.
Tom qab ntawd, lo lus nug yog, qhov piv txwv ntawm 14 thiab 56 yog dab tsi? Raws li ob tug lej 14i56 ib . Geometric txhais tau tias yog √ 14 × 56 . = ±√2×7×2×2×2×7. = ±(2×2×7)=±28.
Yog li ntawd, qhov ratio ntawm 4 thiab 9 yog dab tsi?
Teb: Cov txhais tau tias proportional ntawm 4 thiab 9 yog 6.
Qhov piv txwv ntawm 9 thiab 16 yog dab tsi?
thaum A, B, C txuas ntxiv mus kev faib ua feem ces B hais tias yog tus txhais tau tias proportional . Yog li ntawd, x = 12 Piv txwv li proportional ntawm 9 thiab 16 yog 12.
Pom zoo:
Yam ua piv txwv piv txwv li cas?
Ib khub xaj yog ib khub ntawm tus lej hauv ib qho kev txiav txim. Piv txwv li, (1, 2) thiab (- 4, 12) raug txiav ua khub. Qhov kev txiav txim ntawm ob tus lej tseem ceeb: (1, 2) tsis sib npaug rau (2, 1) -- (1, 2) ≠ (2, 1)
Dab tsi yog qhov txawv ntawm qhov pom tseeb qhov loj thiab qhov ntsuas qhov ntsuas qhov tseeb?
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