(Daim duab 1) Li no squaring ob sab ntawm ib qho tsis sib xws yuav siv tau tsuav yog ob sab tsis yog qhov tsis zoo. Txij li cov hauv paus square tsis yog qhov tsis zoo, qhov tsis sib xws (2) tsuas yog muaj txiaj ntsig yog tias ob tog tsis yog qhov tsis zoo. Li no, squaring ob tog yeej siv tau.
Peb puas tuaj yeem suav ob sab ntawm qhov tsis sib xws?
Koj tuaj yeem square ob sab ntawm qhov tsis sib xws yog tias ob qho tib si tsis yog qhov tsis zoo. Yog tias ob qho tib si tsis zoo koj tuaj yeem square, tab sis cov kev taw qhia ntawm kev tsis sib xws yog flipped.
Yuav ua li cas thaum koj square ob sab ntawm ib qho kev sib npaug?
Thaum koj square ob sab thiab tom qab ntawd daws qhov kev sib npaug,, koj ua tau x=0 raws li kev daws teeb meem. Txawm li cas los xij, x=0 yog ib qho kev daws teeb meem ntxiv vim nws tsis ua rau qhov sib npaug qub! Cov lus teb raug yog x=10.
4 yam tsis sib xws yog dab tsi?
Txoj kev tsis sib xws
- Ntxiv khoom: Yog x < y, ces x + z < y + z. …
- Subtraction property: Yog x < y, ces x − z < y − z. …
- Multiplication property:
- z > 0. Yog x 0 ces x×z < y×z. …
- z < 0. If x < y, and z y × z. …
- Disvision property:
- Nws ua haujlwm raws nraim li qhov sib npaug.
- z > 0.
Txoj cai rau kev tsis sib xws yog dab tsi?
Rules for Solving Inequalities
- Ntxiv tus lej ntawm ob sab.
- Los ntawm ob sab, rho tus lej tib.
- Los ntawm tus lej zoo tib yam, muab ob sab.
- Los ntawm tib tus lej zoo, faib ob sab.
- Mua tus lej tsis zoo ntawm ob sab thiab thim rov qab kos npe.
