Ib qho kev xav yog a kev hloov pauv sawv cev ntawm qhov ntxeev ntawm daim duab. Cov duab tej zaum yuav tshwm sim nyob rau hauv ib tug taw tes, ib kab, los yog ib tug dav hlau. Thaum xav txog ib daim duab nyob rau hauv ib txoj kab los yog nyob rau hauv ib tug taw tes, cov duab yog congruent rau lub preimage. … Txoj kab taag hu ua kab ntawm kev xav.
Ib qho piv txwv ntawm kev xav hauv lej yog dab tsi?
Nyob rau hauv kev xav ntawm kab y=x, x- thiab y-coordinates tsuas yog hloov txoj haujlwm. Piv txwv li, xav tias lub ntsiab lus (6, 7) yog xav txog y=x. Cov kev sib koom ua ke ntawm cov ntsiab lus xav tau yog (7, 6). Ib yam li ntawd, kev xav thoob plaws y=-x entail thim rov qab qhov kev txiav txim ntawm kev tswj hwm, tab sis kuj hloov lawv cov cim.
Koj piav qhia txog kev xav hauv lej li cas?
Nyob rau hauv geometry, ib qho kev xav yog hom kev hloov pauv tsis yooj yim uas qhov preimage yog flipped hla ib kab ntawm kev xav los tsim cov duab. Txhua qhov taw qhia ntawm daim duab yog tib qhov kev ncua deb ntawm kab raws li qhov preimage yog, nyob rau sab nraud ntawm kab.
piv txwv ntawm kev xav yog dab tsi?
Lub ntsiab lus ntawm kev xav yog kev xav lossis sau txog ib yam dab tsi, tshwj xeeb hauv yav dhau los, lossis qhov pom thaum saib rau hauv daim iav lossis lub cev dej. … Ib qho piv txwv ntawm kev xav yog dab tsi ib tug ntxhais pom hauv daim iav thaum nws tso nws pleev.
YX txhais li cas?
Thaum koj xav txog qhov taw tes hla kab y=x, x-coordinate thiab y-coordinate hloov chaw. Yog koj xav txog kab y=-x, x-coordinate thiab y-coordinate hloov chaw thiab re negated (cov paib tau hloov). kab y=x yog point (y, x).
