The zolemeletsedwa pafupifupi mtengo - ndichiyani nanga masamu?

Mu ndondomeko ya kuphunzira masamu ophunzira bwino mfundo masamu ndikutanthauza. Kenako mu ziwerengero ophunzira ena sayansi maso ndipo zina ndi mawerengedwe a Salima Thyolo Zomba. Monga akhale ndi amasiyana mzake?

Avereji ya makhalidwe: tanthauzo ndi kusiyana

Si nthawi zonse zizindikiro zolondola kupereka kumvetsa zinthu. Kuti kuwunika vuto linalake, m'pofunika zina yosanthula kuchuluka yaikulu manambala. Ndiyeno kubwera ku Salima Thyolo Zomba chithandizo. Iwo amalola kuti aone zinthu ambiri.

Kusukulu, akuluakulu ambiri kumbukirani kukhalako kwa zikutanthauza masamu. Ndi lophweka kuwerengera - Uwerenge ndondomeko ya mawu N lagawidwa ndi N. Ndiko kuti, ngati kuli koyenera kuwerengera zikutanthauza masamu a ndondomeko ya mfundo 27, 22, 34 ndi 37, m'pofunika kusankha mawu (27 + 22 + 34 + 37) / 4, popeza mfundo 4 ntchito kuwerengetsera lapansi. Pankhaniyi, chandamale mtengo ndi wofanana 30.

Nthawi zambiri pa chaka kusukulu ndi kuphunzira zikutanthauza zojambula. The mawerengedwe a mtengo izi zochokera m'zigawo za N-hydrochloric muzu wa mankhwala a N-ziwalo. Ngati timatenga manambala yomweyo: 27: 22, 34 ndi 37, chifukwa mawerengedwe ndi wofanana 29,4.

The zikutanthauza amgwirizano mu sukulu za sekondale zambiri osati phunziro la. Komabe, ntchito zambiri. Khalidwe limeneli ndi osiyanitsidwa a masamu limatanthauza ndi kuchita masamu ngati quotient wa N - chiwerengero cha mfundo Uwerenge _1/1 + _1/2 + ... + 1 / _{N a.} Ngati inu kutenga yomweyo ya manambala kwa mawerengedwe a, okhutira amgwirizano a 29,6.

pafupifupi zolemeletsedwa: makhalidwe

Komabe, zedi izi sangathe ntchito kulikonse. Mwachitsanzo, ena ziwerengero mu mawerengedwe a mfundo avareji udindo wofunika kwambiri za "thupi" wina chiwerengero ntchito kuwerengetsera. Zotsatira zambiri zimasonyeza ndi zomveka monga kulola kuti mumve zambiri. Gulu la zosintha dzina ambiri "pafupifupi zolemeletsedwa". Sapita ku sukulu, kotero iwo ofunika kuyang'ana mwatsatanetsatane.

Choyamba, tiyenera akakuuze zimene akutanthauzanji "thupi" wa zopindulitsa. Chophweka njira kufotokoza izi ndi chitsanzo konkire. Kawiri pa tsiku kuchipatala pali thupi kutentha kuyeza wodwala aliyense. Mwa odwala 100 m'madipatimenti osiyanasiyana kuchipatala 44 adzakhala yachibadwa kutentha - 36,6 madigiri. Inanso 30 udzakhala wautali mtengo - 37,2 14 - 38, 7 - 38,5, 3 - 39 ndi otsala awiri - 40. Ndipo ngati inu kutenga masamu ndikutanthauza, mtengo uwu zambiri kuchipatala adzakhala madigiri zoposa 38! Koma pafupifupi theka la odwala kwathunthu yachibadwa kutentha. Ndipo pano izo ziri zolondola kwambiri kugwiritsa ntchito zolemeletsedwa mtengo ambiri ndi "thupi" wina variable ndi chiwerengero cha anthu. Pankhaniyi, chifukwa cha mawerengedwe adzakhala madigiri 37,25. kusiyana ndi lodziwikiratu.

Mu nkhani ya zolemeletsedwa pafupifupi kuwerengetsera kuti "thupi" mwina chiwerengero cha magalimoto anapanga, chiwerengero cha anthu ogwira ntchito mu tsiku kuperekedwa, anthu ambiri, chirichonse chimene angathe kuyeza ndi kulimbikitsa chifukwa komaliza.

mitundu

The zolemeletsedwa mtengo pafupifupi chilamulira chikhalidwe ndi zikutanthauza masamu, tafotokozera kale m'nkhani ino. Komabe, kufunika koyamba, monga zanenedwa, komanso amaganizira kulemera kwa nambala iliyonse ntchito kuwerengetsera lapansi. Komanso pali zolemeletsedwa geometrical ndi amgwirizano mfundo.

Pali zosiyanasiyana wina chidwi ntchito mndandanda wa manambala. Izo za kulemetsedwa kusuntha pafupifupi. Kuti mumaganiza mopitirira pa zifukwa zake. Kuwonjezera mfundo okha ndi kulemera nawonso ntchito pafupipafupi. Ndipo mu mawerengedwe a mtengo chiyerekezo pa nthawi inayake nthawi nawonso n'komwe kufunika kwa intervals yapita nthawi.

The mawerengedwe a makhalidwe amenewa si yovuta kwambiri, komabe kaŵirikaŵiri ntchito kokha ochiritsira pafupifupi zolemeletsedwa.

Njira mawerengedwe

Mu m'badwo wa computerization ponseponse Sikuti kuwerengera ndi pafupifupi zolemeletsedwa pamanja. Komabe, m'pofunika kudziwa mawerengedwe chilinganizo kuti athe kutsimikizira kusintha zotsatira akamavutika.

Chophweka njira adzakhala kuganizira mawerengedwe chitsanzo chapadera.

M'pofunika tikupeza zomwe ziri pafupifupi malipiro pa zomera ndi nkhani chiwerengero cha anthu ogwira ntchito kulandira kangachepe.

Choncho, zolemeletsedwa pafupifupi mawerengedwe wapangidwa ntchito chilinganizo izi:

x (a ₁ * yakumadzulo ₁ + ₂ * yakumadzulo _{2 + ... + ndi N * yakumadzulo N} ) / (w ₁ + yakumadzulo ₂ + ... + yakumadzulo _n)

Mwachitsanzo, mawerengedwe lingakhale:

x (32 * 20 + 33 * 35 + 34 * 14 + 40 * 6) / (20 + 35 + 14 + 6) = (640 + 1155 + 476 + 240) / 75 = 33,48

Mwachionekere, pali movutikira kwambiri kuti pamanja kuwerengera pafupifupi zolemeletsedwa. Tikutsata ndondomeko za kuwerengetsa mtengo uwu mu imodzi mwa ntchito yotchuka kwambiri ya mitunduyi ndi - kupambana - zikuwoneka ngati ntchito SUMPRODUCT (a mndandanda wa manambala, ya miyeso) / ndalama (nambala ya mamba).