Dab tsi yog qhov kawg hauv lej?
Dab tsi yog qhov kawg hauv lej?

Video: Dab tsi yog qhov kawg hauv lej?

Video: Dab tsi yog qhov kawg hauv lej?
Video: nkauj tawm tshiab 2023 Npawm lem and tub zeb vwj 2024, Kaum ib hlis
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Thaum daws proportions nyob rau hauv lej , cov ntsiab lus sab hauv kev suav yog cov siab heev , thiab cov ntsiab lus nruab nrab hu ua txhais tau tias. Thaum teeb tsa qhov sib npaug sib npaug a / b = c / d, tus a thiab d tus lej yog qhov siab heev . Hauv qhov teeb meem no, 15 thiab x yog qhov siab heev , thiab 9 thiab 10 yog cov ntsiab lus.

Yog li ntawd, dab tsi txhais tau tias thiab qhov tseem ceeb hauv lej?

Txhais thiab Extremes . Piav yuav ua li cas los daws qhov sib npaug los ntawm kev sib faib sib npaug yog qhov yooj yim heev. Nws yog ib txoj kev xwb. Kev sau cov kev faib ua li no yuav pab koj nkag siab tias vim li cas peb siv cov ntsiab lus txhais tau tias thiab siab heev . Ob tus lej nruab nrab yog tus txhais tau tias , thiab ob tus lej sab nraud yog siab heev.

Ib yam li ntawd, dab tsi yog extremes algebra? Algebra cov khoom qhia peb tias cov khoom ntawm cov txhais tau tias sib npaug rau cov khoom ntawm cov siab heev . Koj yuav tsum paub tias qhov feem ib nrab yog sib npaug rau ob-plaub plaub. Qhov khoom no muaj txiaj ntsig zoo thaum ib qho txhais tau tias lossis ib qho ntawm cov siab heev tsis paub (Nws tsis paub yog tias nws yog qhov khoob lossis muaj qhov sib txawv xws li x).

Ib tug kuj yuav nug, dab tsi yog qhov kawg thiab txhais tau tias?

Cov txhais tau tias - siab heev cov cuab yeej ntawm proportionsallows koj hla ntau, noj cov khoom ntawm cov txhais tau tias thiab teem lawv sib npaug rau cov khoom ntawm lub siab heev . Cov cuab yeej no los ua ke thaum koj tab tom sim daws qhov kev faib ua feem. Saib daim ntawv qhia no kom paub ntau ntxiv!

Dab tsi yog qhov txhais tau tias cov khoom lag luam siab tshaj plaws?

Theorem 59: ib, khoom ntawm txhais tau tias yog sib npaug rau cov khoom ntawm siab heev . ( txhais tau tias - cov khoom theorem siab heev .) Yog hais tias lawv tsis sib npaug, ces qhov ratios tsis inproportion.

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