2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Peb tab tom nrhiav qhov txiaj ntsig ntawm x qhov twg y'=0, lub ntsiab lus tangent yog kab rov tav. Txij li qhov no yog qhov tseeb tsis tseeb, tsis muaj kev daws teeb meem, yog li, tsis muaj kab rov tav tangents.
Koj ua li cas qhia qhov nkhaus tsis muaj kab rov tav tangents?
vim tsis muaj tangent rau daim duab y=x5 + 2x tuaj yeem muaj qhov sib npaug sib npaug rau 0, tsis tuaj yeem muaj kab rov tav tangents. qhov me tshaj txoj kab nqes tuaj yeem pom los ntawm kev suav tus nqi ntawm x thaum qhov thib ob derivative yog 0. (nco ntsoov tias tag nrho cov gradients 5x4 + 2, rau txhua tus nqi ntawm x, tsis yog qhov tsis zoo.)
Puas yog qhov nkhaus puas muaj tangent?
Hauv geometry, txoj kab tangent (lossis yooj yim tangent) mus rau lub dav hlau nkhaus ntawm qhov taw tes yog txoj kab ncaj nraim uas "tsuas yog kov" qhov nkhaus ntawm qhov taw tes. Leibniz txhais tias nws yog txoj kab dhau los ntawm ob khub ntawm cov ntsiab lus kaw tsis kawg ntawm qhov nkhaus.
Yuav ua li cas thaum ib kab yog tangent mus rau nkhaus?
tangent, nyob rau hauv geometry, tangent kab mus rau ib tug nkhaus ntawm ib tug taw tes yog tias txoj kab ncaj uas kwv yees zoo tshaj plaws (los yog "clings rau") nkhaus nyob ze ntawm qhov taw tes. Tej zaum nws yuav raug suav hais tias yog qhov txwv txoj haujlwm ntawm txoj kab ncaj nraim hla ntawm qhov taw tes thiab qhov chaw ze ntawm qhov nkhaus raws li qhov taw tes thib ob ze rau thawj.
Koj qhia li cas yog kab tangent rau nkhaus?
Kev piav qhia: Los ntawm kev daws ob qhov sib npaug koj yuav tau txais ib qho point (x, y) uas nyob ntawm ob qho tib si nkhaus thiabtxoj kab ncaj nraim. Yog tias koj tau txais ntau tshaj ib qho taw tes ces kab no yuav sib tshuam thiab tsis yog tangent rau qhov nkhaus. yog nws tus nqi sib npaug rau txoj kab nqes ntawm txoj kab ncaj ces kab no yog nws tangent.
Pom zoo:
Thaum twg yog thawj qhov kab rov tav drilled?
Thawj zaug kaw cov roj kab rov tav, drilled ze Texon, Texas, tau ua tiav hauv 1929. Lwm qhov tau xyaum ua hauv xyoo 1944 hauv Franklin Heavy Oil Field, Venango County, Pennsylvania, ntawm qhov tob ntawm 500 feet. Tuam Tshoj sim kab rov tav drilling thaum ntxov li 1957, thiab tom qab ntawd lub Soviet Union kuj sim cov txheej txheem.
Cov kab kab kab kab kab ua kab mob txaus ntshai npaum li cas?
Nyob rau hauv peb thiab tom ntej instars ntawm lawv txoj kev loj hlob, Pine processionary caterpillars yog mob heev rau daim tawv nqaij ntawm tib neegthiab lwm yam tsiaj. Kev sib cuag yooj yim nrog cov plaub hau ntawm kab ntsig tuaj yeem ua rau pob khaus hnyav (urticaria) thiab khaus qhov muag, thiab qee tus neeg yuav muaj kev fab tshuaj.
Vim li cas kyphotic nkhaus yog suav tias yog thawj nkhaus?
Vim li cas kyphotic curves "primary curves"? Vim lawv nyob hauv lub fetal txoj hauj lwm / tus C zoo . Vim li cas lordotic curves "secondary curves"? Vim lawv tshwm sim tom qab yug me nyuam; cervical lordosis pib thaum tus menyuam mos pib tsa nws lub taub hau thiab lumbar lordosis lumbar lordosis Lumbar hyperlordosisyog qhov txuas ntxiv ntawm thaj tsam lumbar, thiab feem ntau hu ua hollow back, sway back, lossis eeb rov qab (tom qab ib qho xwm txheej zoo sib
Dab tsi yog qhov nkhaus ntawm qhov nkhaus?
Nyob rau hauv qhov sib txawv geometry, lub vojvoog ntawm curvature, R, yog qhov sib txuam ntawm qhov curvature. Rau qhov nkhaus, nws sib npaug ntawm lub vojvoog ntawm lub voj voos uas zoo tshaj plaws kwv yees qhov nkhaus ntawm qhov taw tes. Rau qhov chaw, lub vojvoog ntawm curvature yog lub vojvoog ntawm lub voj voog uas zoo tshaj plaws haum rau seem ib txwm lossis kev sib txuas ntawm no.
Puas kab kab rov tav puas muaj txoj kab nqes?
Ib kab kab rov tav muaj nqes xoom vim nws tsis nce vertically (ie y 1 − y 2 =0), hos ib txoj kab ntsug tsis tau txhais txoj kab nqes vim nws tsis khiav horizontally (x 1 − x 2=0). … Vertical kab yog cim sawv cev los ntawm qhov sib npaug, x=a qhov twg a yog x-intercept.
