GeoGebra qhia tau hais tias tus taw tes starting 2 xaus-tom qab tus decimal point npawb tsab, Thaum twg koj mus saib hauv qhov tseem ceeb, zog, los lwm nyob rau hauv lub qhov rai leb.

Koj yuav hloov qhov no yog nias xaiv nyob rau hauv lub tshuab raj thiab mam li pub muab kwv yees:

Taw tes ntawv qhia zaub mov faib ua 2.

0-15 zauv:

Qhov no txhais tau tias, Piv txwv, yog koj xav tias “15 zauv“, thiaj coj nws mus txog 15 zauv nrog, Yog hais tias muaj 15 zauv nyob rau lub.
Yog hais tias muaj xwb 8 zauv nyob rau lub, ces nws tsuas qhia qhov 8 zauv. Txawm hais tias koj tau xaiv, tias nws yuav tsum qhia tau 15.

3-15 significant xaus-npawb tsab:

Qhov no txhais tau tias, Piv txwv, yog koj xav tias “15 significant xaus-npawb tsab“, thiaj li uas qhia tau hais tias tus 15 zauv, REGARDLESS of, Muaj pes tsawg zauv nyob rau lub.

Piv txwv

Sim no:

1. Ntaus ntawv nram qab no nyob rau hauv lub thawv input (koj qhib lub input thawv kom raws li pom cov ntawv qhia zaub mov):

   -0.002x^2+0.3x

2. Daim ntawv ceeb toom rau lub qhov rais leb, qhov muaj tamsim no xwb stands f(x) = 3 x.
3. Nws yog ib, vim geogebra qhia xwb 2 zauv los vim. Yog li no -0.002 tsuas -0.00, txiav, los GeoGebra tsis pom nws, Vim nws yog tib yam li 0.
4. Nce mus rau qhov kev xaiv
5. Xaiv pub muab kwv tus yees
6. Xaiv “5 zauv”.
7. Saib rau ntawm lub qhov rais leb.
8. Tam sim no nws hais tias f(x)=-0.002x ² 0.3 x
9. Nce mus rau qhov kev xaiv
10. Xaiv pub muab kwv tus yees
11. Xaiv “5 significant xaus-npawb tsab”.
12. Saib rau ntawm lub qhov rais leb.
13. Tam sim no nws hais tias f(x)=-0.00200x ² 0.30000 x
14. Koj xaiv xijpeem, Tiam sis, tib yam li kos GeoGebra.

Ntsis!
Brug derefter ‘Formindsk’ -knappen og ‘Forstør’ -khawm kom zoom, samt ‘Flyt tegnefladen’-khawm yuav tawm mus nrog.