Toshloq tumani

3. Mustahkamlash. Testyechiladi.
TESTLAR.

1. 
   a=Ab va с+ЪЬ=0 (Ъф 0) bo‘Isa, - ni toping.
   

c


A)-i- ’ 3


2.


f


1


B)lf


1


C).i D)-i E) -f


^ a² +2a


_Ka(a +1) (a + l)(a + 2) ;


8


ni soddalashtiring.


A)


B)


1


C)


8 ' 4
\ За+ 16 6(a-6)
a + 6 a²+12a + 36j a²-36 a + 6


D)


1


E)


3a


2a


4 ' 8
ni soddalashtiring.

6

1


D) a+ 6 E) a-6


A) 6
( 5m


B)


C)


a + 6 ' a-6
14m \ 5m + \ 3(m-3)


A)


m + 3 m² +6m + 9J m²-9 m + 3
3


B)3


5.


m + 3
a² +ab + b² a²-ab + b²


ni soddalashtiring.
C) m-3 D) 1


E)


m-3 m + 3


A)


a³ -b³
2b


a +b


ni soddalashtiring.


6.


b²-a^{2 7} a²-b²
x³-S x² -4


n \ 2ci p\ \ 2ci
2 / 2 2 / 2


a* + 2a* + 4 a* 2


a²-b²
ni soddalashtiring.


b²-a²


E)


a²-b²


A) 4


В) 2x C) —2x D) 0


E) -4


7.


42






1 -b l + b²


ni soddalashtiring.


C)b-\ D)


l

^fa³+b³ ^

A) 1 В) -1
8. {a³-3a²b + 3ab² -b³\a + by.
A) b²-a² В)a²-b² C) {a-bf D){a+bf E) a²+b²


a + b


-ab


b +1
ni soddalashtiring.


E) -b-1


l


l да .+ ^m ni soddalashtiring.


да -да да-lJ да + 2 да -4


А)


2да-2 да² -4


В)


да
т-2


С)


да -4


D)


1
да + 2


Е)


2да + 1 4-да²

4. 
   Darsni yakunlash.
   
5. 
   Uyga vazifa: test yechish tematik axborotnomalardan
   

Tayyorladi:
Tekshirdi: O’TIBDCE :


20 y.

Sana:

21-mashs⁽ulot
Dars mavzusi. Bir noma’lumli tenglamalar.
Dars maqsadlari: o‘quvchilarga bir noma’lumli tenglamalarni yechishni o‘rgatish, ulaming fanga qiziqishlarini oshirish.


Darsning borishi:

1. 
   Tashkiliy qism.
   
2. 
   Bir noma’lumli tenglamalar.
   

Bir noma’lumli tenglamalar.


ax=b ifodaga bir noma’lumli chiziqli tenglama deyiladi va uning ildizi x = - bo‘lib, u
a
uch xil ko‘rinishga ega boMishi mumkin:

1. 
   a^0,b^R, x = — yechimyagona
   

a

2. 
   a=0, Ьф0, xe0 yechim yo‘q
   
3. 
   <3=0, b=0, xeR yechim cheksiz ko‘p.
   

1. 
   misol: Tenglamani yeching. 5v + 3(3v + 7)=35.
   

Yechish: 5v + 9v + 21=35 => 14x = 35-21 => \4x = 14 x = 1.

2. 
   misol: a ning qanday qiymatida ax+a=5x+8 tenglama yagona yechimga ega?
   

8 — <з
Yechish: ax-5x = 8-a => x{a -5) = 8- <2=>jc = => а ф 5.
<з-5

3. 
   misol: к ning qanday qiymatida k+4x=k²x+2 tenglama yechimga ega emas? Yechish: 4x-k²x = 2-k => x{4- k²) = 2-k: 1) 4-k² =0 к = ±2
   

2) 2-k ф0 к ф 2 ■
Javob: k=-2.

4. 
   misol: m ning qanday qiymatida 6+m²x=36x+m tenglama cheksiz ko‘p yechimga ega?
   

Yechish: m²x - 36x = m - 6 => x(m² - Зб) = m - 6':

1. 
   nr -36 = 0 =>m = ±6.
   
2. 
   m-6 = 0 => in = 6
   

Javob: m=6.
3. Mustahkamlash. Test yechiladi.
TESTLAR.

1. 
   (з^ ₊ л-]_:41 = 5 tenglamani yeching.
   

A) 21 B)17— C)18— D)17— E) 18 —

^{y y} 22 22 22 ^У 11

2. n ning qanday qiymatlarida nx+\=n+x tenglama cheksiz ko‘p yechimga ega boTadi?
А) пф! В) n=2 C) n=\ D) n=0 E) n=-2 ³


3. a ning qanday qiymatlarida ax=2x+3 tenglama yechimga ega boMmaydi?
А) аФ-2 В) аФ2 С) а= 2 D) аф\ Е) а= 0