Vadrat tengsizlik va uning yechimi. Dars maqsadi: a ta’limiy maqsad


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kvadrat tengsizlik

Yangi mavzuni mustahkamlash: 60 – misol.

Quyidagi tengsizliklardan qaysilari kvadrat tengsizlik ekanini ko’rsating:

1) x2 – 4 > 0 kvadrat tengsizlik; 2) x2 – 3x – 5≤ 0 kvadrat tengsizlik;

3) x + 4 > 0 kvadrat tengsizlik emas; 4) 4x – 5< 0 kvadrat tengsizlik emas;

5) x2 – 1 ≤ 0 kvadrat tengsizlik; 6) x4 – 16 > 0 kvadrat tengsizlik;

61 – misol.

Quyidagi tengsizlikni kvadrat tengsizlikka keltiring:

1) x2 < 3x+2, x2 – 3x – 2 < 0. 2) 3x2 –1>x, 3x2 – x –1 > 0.

3) 3x2 2 –5x+6, 3x2 – x2 + 5x – 6, 2x2 + 5x – 6,

4) 2x(x + 1)< x+5, 2x2 + 2x – x – 5 < 0, 2x2 + x – 5 < 0,

62 – misol og’zaki bajariladi.

63 – misol.

1) (x – 2)( x + 4) >0 2) (x – 11)(x– 3)<0



yoki

Javob: x >2. Javob: 3 < x < 11.


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