Hauv kev txhais lus saum toj no, lub ntsiab lus tseem ceeb yog cuam tshuam nrog lub ntsiab lus txhais, yog li es tsis txhob hloov npe lub ntsiab lus txhais, peb siv lub cim tseem ceeb los qhia qhov no. Lub ntsiab lus (los yog daim duab) hu ua preimage thiab txhais taw tes (los yog daim duab) hu ua daim duab.
Dab tsi yog qhov preimage ntawm kev txhais lus?
Kev txhais lus Kev txhais lus yog ib qho piv txwv ntawm kev hloov pauv uas txav txhua qhov taw tes ntawm cov duab tib qhov deb thiab nyob rau tib txoj kev. Kev txhais lus tseem hu ua slides. Duab Hauv kev hloov pauv, daim duab kawg hu ua daim duab. Preimage Hauv kev hloov pauv, tus thawj daim duab yog hu ua preimage.
Dab tsi yog qhov preimage hauv geometry?
Txuas Geometric thiab Algebraic Cov Tswv Yim
Tus qauv qub ntawm cov khoomyog hu ua Pre-Image thiab qhov kawg cov duab thiab txoj hauj lwm ntawm cov khoom yog daim duab hauv qab no kev hloov pauv.
Dab tsi yog lub cim tseem ceeb hauv lej?
Lub cim tseem ceeb (′) yog nquag siv los sawv cev taw (ft) thiab arcminutes (arcmin). … Qhov thib ob prime (″) sawv cev rau ntiv tes (hauv) thiab arcseconds (arcsec). Txawm li cas los xij, kom yooj yim, siv ib qho ( ) (ob chav hais lus) feem ntau siv.
Tus thawj tswj hwm yog dab tsi?
So the coordinates of P^{prime \prime} is opposite cov P. Piv txwv li, A=(-5, 3) and A^{prime \prime}=(5, -3). Yog tias peb kos ib kab ntu ntawm A thiab A^{prime \prime} nwsmidpoint nyob ntawm keeb kwm (0, 0), thiab tib yam muaj tseeb rau tag nrho lwm cov ntsiab lus.
