Video: Cov lej ntawm cov lej lej puas tuaj yeem tsis zoo?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov cwj pwm ntawm cov lej lej nyob ntawm qhov sib txawv d. Yog tias qhov sib txawv, d, yog: Zoo, qhov sequence yuav kev vam meej mus rau infinity (+∞) Tsis zoo , cov sequence yuav regress mus rau tsis zoo infinity (-∞)
Ntxiv mus, cov sum ntawm ib series yuav tsis zoo?
Koj tham txog lub sum ntawm ib infinite series uas implies tias series yog geometric, txij li tus lej lej tsis kawg series tau yeej tsis converge. Nco ntsoov, qhov sib piv yuav tsum yog |r| <1 rau a sum muaj nyob. Yog li yog hais tias tus piv piv yog zoo muaj ua tau ua no negative sum.
Tsis tas li ntawd, qhov sum ntawm finite arithmetic series yog dab tsi? Cov sum of (n) cov ntsiab lus ntawm ib lej lej series yog (5{n}^{2}-11n) rau tag nrho cov nqi ntawm (n). Txiav txim siab qhov sib txawv. Cov sum ntawm ib lej lej series yog (ext{100}) zaug nws thawj lub sij hawm, thaum lub sij hawm kawg yog (ext{9}) zaug thawj lub sij hawm.
Yog li ntawd, ua li cas koj thiaj nrhiav tau cov lej ntawm cov lej lej?
Rau nrhiav tus sum ntawm ib lej lej ua ntu zus, pib los ntawm kev txheeb xyuas tus lej thawj thiab tus lej kawg hauv ntu. Tom qab ntawd, ntxiv cov lej ua ke thiab faib cov sum los ntawm 2. Thaum kawg, muab tus lej ntawd los ntawm tus lej tag nrho ntawm cov ntsiab lus hauv ib ntu mus nrhiav tus sum.
Dab tsi yog N hauv series?
Thawj lub sij hawm yog a1, qhov sib txawv yog d, thiab tus lej ntawm cov ntsiab lus yog. Tus lej ntawm tus lej lej series yog pom los ntawm kev muab tus lej ntawm cov ntsiab lus lub sij hawm nruab nrab ntawm thawj thiab zaum kawg. Txhawm rau nrhiav, siv cov qauv qhia meej rau tus lej lej ib ntus . Peb daws 3 + (– 1) · 4 = 99 kom tau = 25.
Pom zoo:
Koj puas tuaj yeem siv kev txhaum thiab cos ntawm cov duab peb sab tsis zoo?
Xav txog lwm daim duab peb sab uas tsis yog txoj cai, sau npe raws li qhia nrog sab ntev x thiab y. Peb tuaj yeem muab tau ib txoj cai muaj txiaj ntsig uas tsuas muaj cov haujlwm cosine xwb. Txoj cai ntawm cosines tuaj yeem siv los nrhiav kev ntsuas ntawm lub kaum sab xis lossis ib sab ntawm daim duab peb sab uas tsis yog txoj cai yog peb paub: peb sab thiab tsis muaj kaum
Puas yog qhov tsis zoo thiab qhov zoo nqes hav tuaj yeem sib npaug?
Theorem 104: Yog hais tias ob kab muaj tib txoj kab nqes, ces cov kab yog nonverttical parallel kab. Yog hais tias ob kab yog perpendicular thiab tsis yog ib tug ntsug, ces ib tug ntawm cov kab muaj ib tug zoo nqes hav, thiab lwm yam muaj ib tug tsis zoo nqes hav. Tsis tas li ntawd, qhov tseem ceeb ntawm lawv txoj kab nqes yog qhov sib txuam
Koj puas tuaj yeem qhia los ntawm cov kev nqus dej no seb lub teeb liab puas ua haujlwm zoo hauv kev tsav tsheb photosynthesis?
Ib qho tsis tuaj yeem qhia los ntawm daim duab no, tab sis vim tias chlorophyll ib lub teeb liab, peb tuaj yeem kwv yees tias nws yuav ua tau zoo hauv kev tsav tsheb photosynthesis. Cov xim no muaj peev xwm nqus tau ntau lub teeb ntawm lub teeb (thiab yog li ntau lub zog) dua li chlorophyll ib leeg tuaj yeem nqus tau
Vim li cas lub cube cag ntawm tus lej tsis zoo yog tus lej tsis zoo?
Tus lej tsis zoo lub voos xwmfab hauv paus yuav tsis zoo Txij li qhov ntsuas tus lej txhais tau tias tsa nws mus rau lub zog thib 3 - uas yog khib - lub voos xwmfab ntawm cov lej tsis zoo yuav tsum yog qhov tsis zoo. Thaum lub qhov hluav taws xob tawm (xiav), qhov tshwm sim tsis zoo. Thaum lub qhov hluav taws xob qhib (daj), qhov tshwm sim yog qhov zoo
Txoj cai thermodynamic twg hais tias koj Tsis tuaj yeem hloov 100 feem pua ntawm cov cua sov rau hauv cov khoom siv hluav taws xob ntawm cov lus teb xaiv?
Txoj Cai thib ob