Video: Txhais tau li cas los txhais ib daim duab peb sab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev txhais lus. A txhais lus yog ib qho kev hloov pauv uas tshwm sim thaum ib daim duab txav los ntawm ib qho chaw mus rau lwm qhov chaw yam tsis tau hloov nws qhov loj me, cov duab lossis kev taw qhia. Rau txhais lub point P(x, y), ib units txoj cai thiab b units, siv P'(x + a, y + b).
Kuj paub, txhais ib daim duab peb sab txhais li cas?
Hauv geometry, a translation yog tus hloov ntawm ib daim duab los ntawm ib qho chaw mus rau lwm qhov yam tsis tau tig, xav txog lossis hloov nws qhov loj. Qhov no yog ua los ntawm kev txav cov vertices ntawm daim duab tus naj npawb ntawm qhov chaw ntawm lub dav hlau sib koom tes thiab tom qab ntawd kos daim duab tshiab.
Ib sab saum toj no, tus qauv rau kev txhais lus yog dab tsi? Hauv lub dav hlau coordinate peb tuaj yeem kos tus txhais lus yog tias peb paub cov kev taw qhia thiab deb npaum li cas daim duab yuav tsum txav mus. Rau txhais lub point P(x, y), ib units txoj cai thiab b units, siv P'(x + a, y + b).
Ib yam li ntawd, tib neeg nug, koj xav li cas txog daim duab peb sab?
Daim duab peb sab A'B'C' yog cov duab ntawm daim duab peb sab ABC tom qab lub ntsiab lus xav txog hauv keeb kwm. Xav txog txoj kab ncaj nraim txuas A mus rau A' qhov twg lub hauv paus chiv keeb yog qhov nruab nrab ntawm ntu. Thaum koj xav txog ib qho taw tes hauv keeb kwm, ob qho tib si x-coordinate thiab y-coordinate yog negated (lawv cov cim tau hloov).
Dab tsi yog qhov sib npaug rau kev txhais lus?
Txoj Cai rau Kev Txhais Lus Vertical: yog y = f(x), ces y = f(x) + k muab cov txhais lus ntsug. Kev txhais lus k txav daim duab nce siab thaum k yog ib qho postive tus nqi thiab downward thaum k yog negative tus nqi . Ntawm no yog ib qho kev sib npaug ntawm ib qho ntawm cov kab rov tav txhais lus:, koj xav tias nws yog leej twg?
Pom zoo:
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