Factors vs Ntau
Qhov xwm txheej thiab ntau ntxiv yog ob qhov sib txawv tab sis muaj feem cuam tshuam cov ntsiab lus hauv Basic Algebra. Factors thiab multiples coj mus rau zaj lus qhia ntawm factoring. Lub tswv yim ntawm kev tsim khoom yog qhov yooj yim heev, tab sis lub ntsiab lus tseem ceeb vim nws muaj ntau daim ntawv thov hauv ntiaj teb tiag.
Factor
Nyob rau hauv lej, ib qho Factor, tseem hu ua tus divisor yog ib qho integer lossis algebraic qhia uas faib lwm tus lej lossis kev qhia yam tsis muaj kev ceeb toom. Factor tuaj yeem yog qhov zoo thiab qhov tsis zoo. Qhov no suav nrog 1 thiab tus lej nws tus kheej. Piv txwv li, 2 yog qhov tseem ceeb ntawm 14 vim 14/2 yog raws nraim 7. Cov yam ntxwv ntawm 14 yog 1, 2, 7, 14, -1, -2, -7 thiab -14 (tab sis tsuas yog qhov zoo feem ntau yuav hais, piv txwv li 1, 2, thiab 4.). Piv txwv li, x + 3 yog qhov tseem ceeb ntawm kev qhia algebraic x2+11x+24.
Ib tus lej zoo dua 1 lossis ib qho kev qhia txog algebraic uas tsuas muaj ob yam, 1 thiab tus lej nws tus kheej yog hu ua prime. Piv txwv li 5 yog tus lej tseem ceeb, vim nws tsuas yog faib los ntawm 1 thiab tus lej xwb. Ntawm qhov tod tes, yog tias tus lej zoo lossis qhov qhia txog algebraic muaj ntau tshaj ob yam, nws yog hu ua composite. Piv txwv li, 6 yog sib npaug los ntawm 2 thiab 3, ntxiv rau 1 thiab nws tus kheej. Txij li tus naj npawb 1 muaj ib qho tseem ceeb '1', nws tsis yog thawj lossis sib xyaw. Peb tuaj yeem sau txhua tus lej raws li cov khoom ntawm nws cov yam ntxwv. Piv txwv li, peb tuaj yeem sau 12 raws li qhov khoom ntawm 2 thiab 6 (piv txwv li 12=2 × 6) thiab kuj yog cov khoom ntawm 3 thiab 4 (i.e. 12=3 × 4).
Multiple
Qhov ntau ntawm tus lej yog qhov tshwm sim ntawm kev muab tus lej ntawd los ntawm lwm tus lej. Ntau yam, ntawm qhov tod tes, yog cov khoom ntawm yam. Rau qhov ntau thiab b peb hais tias a yog ntau yam ntawm b, yog tias a=nb rau qee tus lej ntawm n, qhov n yog hu ua tus multiplier. Piv txwv li, 5, 10, 15 yog qhov ntau ntawm 5 vim tias cov lej no tuaj yeem sau ua cov khoom ntawm 5 thiab lwm tus lej. 0 yog ntau tus lej thiab txhua tus lej yog ntau nws tus kheej.
Dab tsi yog qhov sib txawv ntawm Factors thiab Ntau?
– Cov ntsiab lus yog tsim los ntawm kev sib npaug thiab sib npaug, lossis faib thiab faib nyiaj; hos Ntau yam yog cov khoom ntawm yam.
– Ntau, ntawm qhov tod tes, yog cov khoom lag luam.
