Video: Yuav ua li cas koj pom qhov piv ntawm ib kab segment?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum pom ib qho point, P, muab faib a kab ntu , AB, v piv a/b, peb xub pom a piv c = a / (a + b). Txoj kab nqes ntawm a kab ntu nrog cov ntsiab lus kawg (x1, y1) thiab (x2, y2) yog muab los ntawm cov qauv nce / khiav, qhov twg: nce = y2 - y1. run = x2 - x1.
Yog li ntawd, txoj kab segment formula yog dab tsi?
Tshooj qauv qhia peb lub coordinates ntawm lub point uas faib ib tug muab kab ntu ua ob ntu xws li lawv qhov ntev yog nyob rau hauv qhov piv m: n m: n m: n. Qhov nruab nrab ntawm a kab ntu yog lub ntsiab lus uas faib a kab ntu hauv ob qho tib si.
Ib yam li ntawd, koj pom 1/3 ntawm ib kab li cas? Rau nrhiav lub ntsiab lus uas yog ib feem peb ntawm qhov kev ncua deb ntawm (–4, 1) mus rau lwm qhov kawg, (8, 7): Hloov x1 nrog - 4, x2 ua 8,y1 ua 1,y2 nrog 7,k 1/3 . Tshem tawm cov txiaj ntsig hauv kab lus sab hauv. Ua qhov sib npaug thiab tom qab ntawd ntxiv cov txiaj ntsig kom tau txais cov kev tswj hwm.
Cov lus nug tseem yog, dab tsi yog qhov ratio kab?
Re: Ratio Kab Nws yog tus kab uas mus dhau lub hauv paus chiv keeb thiab lub ntsiab lus sib npaug rau Sum(Y)/Sum(X). Yog li nws tso cai rau koj los sib piv cov ntaub ntawv tus kheej taw tes piv nrog qhov nruab nrab tag nrho piv.
Nyob rau hauv dab tsi piv yog kab segment koom nrog cov ntsiab lus?
Co-ordinates ntawm lub taw tes uas faib cov kab sib koom (1, − 2) (1, -2) (1, −2) thiab (4, 7) (4, 7) (4, 7) sab hauv piv 1:2 1:2 1:2 yog.
Pom zoo:
Yuav ua li cas koj pom qhov ntsuas qhov ntsuas ntawm dilation ntawm lub dav hlau ua haujlwm?
Daim duab peb sab ABC nrog kev ua haujlwm A(2, 6), B(2, 2), C(6, 2). Tom qab ntawd dilate daim duab los ntawm qhov ntsuas qhov ntsuas ntawm 1/2 nrog lub hauv paus los ua qhov nruab nrab ntawm dilation. Ua ntej, peb kos peb daim duab peb sab qub hauv lub dav hlau ua haujlwm. Tom ntej no, peb muab txhua qhov kev sib koom tes los ntawm qhov ntsuas qhov ntsuas ntawm 1/2
Yuav ua li cas koj nrhiav tau qhov sib npaug ntawm lub perpendicular bisector ntawm ib kab segment?
Sau ib qho kev sib npaug rau hauv point-slope daim ntawv, y - k = m (x - h), vim txoj kab nqes ntawm perpendicular bisector anda point (h, k) bisector mus dhau los paub. daws qhov sib npaug ntawm qhov taw tes rau y kom tau y = mx + b. Distribute theslope tus nqi. Txav tus nqi k mus rau sab xis ntawm qhov sib npaug
Nws puas yuav ua rau pom qhov sib npaug ntawm kab sib npaug mus rau ib kab thiab los ntawm ib qho taw tes ntawm kab?
Qhov sib npaug ntawm ib kab uas yog parallel lossis perpendicular rau ib kab? Cov lus teb tau: Cov nqes hav ntawm cov kab sib npaug sib npaug. Hloov txoj kab nqes paub thiab cov kev sib koom ua ke ntawm ib qho taw tes ntawm lwm txoj kab rau hauv daim ntawv point-slope kom pom qhov sib npaug ntawm kab sib npaug
Yuav ua li cas koj pom qhov sib npaug ntawm qhov nqus ntawm qhov nqus?
X = [Fe(SCN)2+] thiab yuav tsum tau txiav txim los ntawm tus qauv nkhaus. Tom qab ntawd koj tuaj yeem xam qhov sib npaug tas li, Keq, siv qhov sib npaug sib npaug. Tus qauv nkhaus yog ib zajlus ntawm Absorbance piv [Fe(SCN)2+] (Daim duab 8.1). Nws tuaj yeem siv los muab peb cov concentration ntawm cov tshuaj thaum muab cov absorbance
Yuav ua li cas muaj pes tsawg tus tooj liab atoms koj yuav tsum tau kab ntawm ib sab los tsim ib kab 1'm ntev?
Los ntawm kev sib piv, lub ntiaj teb cov pej xeem tsuas yog hais txog 7? 109 neeg. Yog tias koj tuaj yeem ua kab 100,000,000 tooj liab atoms ib sab, lawv yuav tsim ib txoj kab ntev li 1 cm