17.       Miillinetr qog`ozda y = 3x<sup>2</sup> funksiyaning grafigini yasang. Grafik bo`yicha:

            1) x = –2,8; –1,2; 1,5; 2,5 bo`lganda y ning qiymatini toping.

            2) agar y = 9; 6; 2; 8; 1,3 bo`lsa, x ning qiymatini toping.

 

18.              (Og`zaki.) Parabola tarmoqlarining yo`nalishini aniqlang:

 

1) y = 3x²;                   2)                3) y = –4x²;                 4)

 

19.              Quyidagi funksiyalarning grafiklarini bitta koordinata tekisligida yasang:

 

1) y = x²  va  y = 3x²;                                     2) y = –x²  va  y = –3x²;

 

3) y = 3x²  va  y = –3x²;                                 4)   va  .

 

Grafiklardan foydalanib, bu funksiyalardan qaysilari x ≥ 0 oraliqda o`suvchi ekanini aniqlang.

 

 

 

20.              Quyidagi funksiyalar grafiklari kesishish nuqtalarining koordinatalarini toping:

 

1) y = 2x²  va  y = 3x + 2;                              2)   va

 

21.              Funksiya x ≤ 0 oraliqda kamayuvchi bo`ladimi:

 

1) y = 4x²;                   2)                3) y = –5x²;                 4)

 

22.              y = –2x² funksiya:

1) [–4; –2] kesmada;                                      2) [–5; 0] kesmada;

3) (3; 5) intervalda;                                         4) (–3; 2) intervalda

o`suvchi yoki kamayuvchi bo`lishini aniqlang.

 

23.              Tekis tezlanuvchan harakatda jism bosib o`tgan yo`l  formula bilan hisoblanadi, bunda s – yo`l, metrlarda; a – tezlanish, m/s<sup>2</sup> larda; t – vatq, sekundlarda o`lchanadi. Agar jism 8 s da 96 km yo`lni bosib o`tgan bo`lsa, a tezlanishni toping.

TEST