Yuav ua li cas koj nrhiav tau peb sib law liag txawm integers?
Yuav ua li cas koj nrhiav tau peb sib law liag txawm integers?

Video: Yuav ua li cas koj nrhiav tau peb sib law liag txawm integers?

Video: Yuav ua li cas koj nrhiav tau peb sib law liag txawm integers?
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Peb sib law liag txawm integers tuaj yeem sawv cev los ntawm x, x + 2, x + 4. Cov sum yog 3x + 6, uas yog sib npaug rau 108. Yog li, 3x + 6 = 108. Kev daws rau x yields x = 34.

Ib yam li ntawd, nws tau nug, peb tus lej sib law liag ntawm 54 yog dab tsi?

Teb thiab piav qhia: Lub peb sib law liag Cov lej tuaj yeem sawv cev ua 2n, 2n + 2 2 n + 2 thiab 2n + 4 2 n + 4. Lawv qhov sum yog 54 . Qhov no txhais tau tias nruab nrab tus lej yog 18.

Kuj Paub, koj ua li cas thiaj nrhiav tau plaub tus lej sib law liag? Txij li thaum koj tab tom sim nrhiav plaub tus lej sib law liag thawj tus yuav yog X. tus tom ntej yuav x + 1 thiab lwm yam. Tom qab ntawd koj yuav ua kom koj qhov kev sib npaug yooj yim thiab nws yuav yog 4x + 6 (x, x + 1, x + 2, x + 3) thiab tom qab ntawd koj yuav muab nws sib npaug rau 114 thiab daws.

Tib neeg kuj nug, dab tsi yog 4 sib law liag txawm tus lej?

Rau np., 2 i 4 yog sib law liag txawm integers vim ob tus lej yog tus lej , divisible los ntawm ob, thiab 4 yog tom ntej no txawm integer loj dua 2. Ib yam li ntawd, 14 thiab 16, 8 thiab 10, 100 thiab 102, kuj yog cov piv txwv ntawm sib law liag txawm integers.

Puas yog 0 tus lej sib npaug?

Zero yog ib tus lej . Nyob rau hauv lwm yam lus, nws parity-qhov zoo ntawm ib tug integer ua txawm los yog khib-yog txawm . Qhov no tuaj yeem txheeb xyuas tau yooj yim raws li lub ntsiab lus ntawm " txawm ": nws yog tus lej ntau ntau ntawm 2, tshwj xeeb 0 × 2.

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