Kev nthuav dav txhais tau hais tias txhawm rau muab txhua lo lus hauv kab ke los ntawm kev qhia sab nraud. Piv txwv li, hauv kab lus 3 (m + 7), muab ob qho tib si. 3 (m + 7)=3 × m + 3 × 7=3 m + 21.
Koj nthuav cov lej li cas?
Hauv daim ntawv nthuav dav cov lej ntawm tus lej yog faib rau txhua tus lej nrog lawv qhov chaw tus nqithiab sau rau hauv daim ntawv nthuav dav. Piv txwv ntawm cov qauv ntawm tus lej yog 4, 982 thiab tib tus lej tuaj yeem sau hauv daim ntawv nthuav dav li 4 × 1000 + 9 × 100 + 8 × 10 + 2 × 1=4000 + 900 + 80 + 2.
Koj ua li cas yooj yim?
Txhawm rau ua kom yooj yim txhua qhov kev qhia algebraic, cov hauv qab no yog cov cai thiab cov kauj ruam:
- Tshem tawm cov cim pawg xws li cov hlua khi thiab cov kab lus los ntawm kev muab ntau yam.
- Siv txoj cai exponent kom tshem tawm pawg yog tias cov ntsiab lus muaj exponents.
- Muab cov lus zoo li los ntawm kev ntxiv lossis rho tawm.
- Sib xyaw ua ke.
Dab tsi yog qhov nthuav dav?
Kev nthuav dav txhais tau hais tias txhawm rau muab txhua lo lus hauv kab ke los ntawm kev qhia sab nraud. Piv txwv li, hauv kab lus 3 (m + 7), muab ob qho tib si. thiab 7 by 3, yog li: 3 (m + 7)=3 × m + 3 × 7=3 m + 21.
Koj ua li cas yooj yim zog?
Yuav kom yooj yim lub zog ntawm lub hwj chim, koj muab cov exponents, ua kom lub hauv paus zoo ib yam . Piv txwv li, (23)5=215. Rau txhua tus lej zoo x thiab tus lej a thiab b: (xa)b=xa· b. Simplify.