Video: Koj tuaj yeem qhia tau li cas yog tias kev sib raug zoo yog symmetrical?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A kev sib raug zoo yog symmetrical , peb soj ntsuam uas rau tag nrho cov nqi ntawm a thiab b: a R b implies b R a. Cov kev sib raug zoo ntawm kev sib npaug dua yog symmetrical . Yog x=y, peb kuj sau tau uas y = x.
Ib yam li ntawd, nws txhais li cas rau kev sib raug zoo kom sib luag?
A symmetrical kev sib raug zoo yog ib hom binary kev sib raug zoo . Ib qho piv txwv yog tus kev sib raug zoo " yog equal to", vim yog a = b yog true ces b = a yog kuj muaj tseeb. Raws li txoj cai, binary kev sib raug zoo R dhau ib teev X yog symmetrical yog tias thiab tsuas yog: Yog RT sawv cev rau lub converse ntawm R, ces R yog symmetrical yog thiab tsuas yog R = RT.
Qhov thib ob, kev sib raug zoo puas tuaj yeem sib luag thiab tsis sib haum? A kev sib raug zoo tau ua ob leeg symmetrical thiab antisymmetrical , npr kev sib raug zoo ntawm kev sib npaug. Nws yog symmetrical txij li a=b?b=a tab sis kuj yog antisymmetrical vim koj muaj ob qho tib si a=b thiab b=a iff a=b (oh, zoo).
Tsuas yog li ntawd, koj ua li cas txiav txim siab hloov pauv thiab hloov pauv symmetrical?
- Reflexive. Kev sib raug zoo yog reflexive. Yog tias (a, a) ∈ R rau txhua ∈ A.
- Symmetrical. Kev sib raug zoo yog sib npaug, Yog tias (a, b) ∈ R, ces (b, a) ∈ R.
- Kev hloov pauv. Kev sib raug zoo yog hloov pauv, Yog tias (a, b) ∈ R & (b, c) ∈ R, ces (a, c) ∈ R. Yog hais tias kev sib raug zoo yog reflexive, symmetric thiab transitive, nws yog qhov sib npaug sib npaug. Cia peb ua piv txwv.
4 hom symmetry yog dab tsi?
Cov plaub lub ntsiab hom ntawm no symmetry yog txhais, rotation, reflection, thiab glide reflection.
Pom zoo:
Nws txhais li cas thaum kev sib raug zoo ntawm kev sib raug zoo ua kev cuam tshuam?
Kev sib raug zoo ntawm ob tus neeg uas txhua tus neeg nyob ntawm thiab tau txais kev txhawb zog, txawm tias muaj txiaj ntsig lossis kev puas tsuaj, los ntawm lwm tus. ib qho kev sib cuam tshuam lossis kev sib raug zoo ntawm ob tus neeg, pab pawg, thiab lwm yam
Koj tuaj yeem qhia tau li cas yog tias ob qhov sib npaug sib npaug?
Peb tuaj yeem txiav txim siab los ntawm lawv qhov sib npaug seb puas yog ob kab sib npaug los ntawm kev sib piv lawv cov nqes hav. Yog hais tias cov slopes yog tib yam thiab cov y-intercepts txawv, cov kab yog parallel. Yog tias txoj kab nqes sib txawv, cov kab tsis sib npaug. Tsis zoo li cov kab sib luag, cov kab perpendicular sib tshuam
Dab tsi scatter zaj duab xis qhia tau hais tias muaj kev sib raug zoo tsis zoo?
Nws yog tseeb los ntawm scatterplot tias y txo qis li x nce. Peb hais tias muaj kev sib raug zoo tsis zoo nyob nruab nrab ntawm qhov sib txawv x thiab y. Xav txog cov nram qab no scatterplot: Peb saib tias y nce li x nce, thiab cov ntsiab lus tsis nyob ntawm txoj kab ncaj nraim
Koj tuaj yeem qhia tau li cas yog tias lub pob zeb tsis pom kev nkag mus?
Intrusive igneous pob zeb txias los ntawm magma maj mam vim hais tias lawv faus rau hauv qab saum npoo, yog li lawv muaj cov muaju loj. Extrusive igneous pob zeb txias los ntawm lava sai heev vim lawv tsim ntawm qhov chaw, yog li lawv muaj cov muaju me me
Koj yuav ua li cas thiaj paub tias kev sib raug zoo yog qhov zoo lossis tsis zoo?
Qhov zoo correlation coefficient txhais tau hais tias raws li tus nqi ntawm ib qho kev sib txawv nce, tus nqi ntawm lwm qhov sib txawv nce; raws li ib tug txo qhov qis dua. Qhov tsis zoo correlation coefficient qhia tau hais tias raws li ib qho kev sib txawv nce, qhov txo qis, thiab vice-versa