M a sh q l a r
Yig‘indini ko‘paytma shaklida yozning (121-122):
121. 1) 4+4+4+4+4; 3) c+c+c;
2) 6+6+6+6; 4) a+a+a+a+a.
122. 1) 2m+2m+2m; 5) 
;
2) 17ab+17ab+17ab; 6)
;
3) (c–2d)+(c–2d); 7)
;
4) (3b–a)+(3b–a)+(3b–a); 8)
.
Ko‘paytmani
daraja shaklida yozing (123–125):
123. 1) 2·2·2·2·2; 2) 
;
3) 
; 4) (–2,7)·(–2,7)·(–2,7)·(–2,7).
124. 1) x·x·x·x·x; 3) (2a)·(2a)·(2a);
2) m·m·m·m·m; 4) (–3b)·(–3b)·(3b)·(3b).
. 125. 1) (x–y)·(x–y)·(x–y); 3) 
;
2) (a+b)·(a+b); 4) 
.
Ko‘paytmaning daraja shaklidagi yozuvidan foydalanib, ifodani soddalashtiring (126–128):
126. 1) 2·2·2·15; 3) 5·5·8·8·8·2·2;
2) 4·4·4·4·21; 4) 6·6·7·7·3·3·3.
127. 1)
1,2·1,2·2·2·5·5; 2)
0,5·0,5·0,5·2·2·4·4;
3) 0,3·0,3·
···; 4) 
···2,3·2,3.
128. 1)
9·9·9·a·a·a; 3) 
2) 
4) 
.
Ifodani
soddalashtiring (129–130):
129. 1) 
; 3) 
;
2) 
; 4) 
.
130. 1) 
; 3) 
;
2) 
; 4) 
.
Ifodani
o‘qing, darajaning asosini, daraja ko‘rsatkichini ayting:
131. 1) 
; 3) 
; 5) 
;
2) 
; 4) 
; 6) 
.
Hisoblang
(132–139):
132.
1) 
; 2) ; 3) 
; 4) 
.
133
1) 
; 2) 
; 3) 
; 4) 
.
134.
1) 
; 2) 
; 3) 
; 4) 
.
135.
1) 
; 2) 
; 3) 
; 4) 
.
136. 1) 
; 2) 
; 3) 
; 4) -
.
137. 1) 
; 2) 
; 3) 
; 4) 
.
138. 1) 
; 2) 
; 3) 
; 4) 
.
139. 1) 
; 2) 
; 3) 
; 4) 
.
140. 
ifodaning
qiymatini 
da toping.
141. 
ifodaning
qiymatini x ning jadvalda keltirilgan qiymatlari uchun hisoblang:
|
x |
0 |
1 |
–1 |
2 |
–2 |
3 |
–3 |
4 |
–4 |
5 |
–5 |
6 |
–6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
142. 
ifodaning
qiymatini x ning jadvalda ko‘rsatilgan qiymatlari uchun hisoblang:
|
x |
0 |
1 |
–1 |
2 |
–2 |
3 |
–3 |
4 |
–4 |
5 |
–5 |
6 |
–6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
143. Quyidagi da’volarning qaysi biri to‘g‘ri, qaysi biri noto‘g‘ri? Sababini tushuntiring. Da’vo noto‘g‘ri deb aytsangiz,
uni rad etuvchi misol toping.
1) ikkita
sonning kvadratlari teng bo‘lsa, bu
sonlarning o‘zlari ham teng;
2) ikkita
sonning kublari teng bo‘lsa, bu
sonlarning o‘zlari ham teng;
3) agar manfiy songa uning
kvadrati qo‘shilsa, musbat son hosil bo‘ladi;
4) agar manfiy sondan uning
kvadrati ayirilsa, manfiy son hosil bo‘ladi;
5) agar musbat sondan uning
kvadrati ayirilsa, musbat son hosil bo‘ladi.
Quyidagi da’volarning qaysi biri to‘g‘ri,
qaysi biri no to‘g‘ri? Sababini tushuntiring. Mos
misollar tuzing (144–145):
144. 1) natural sonning
kvadrati ixtiyoriy raqam bilan tugashi
mumkin;
2) natural sonning kubi ixtiyoriy
raqam bilan tugashi mumkin.
145. 1) natural sonning
to‘rtinchi darajasi faqat 0; 1; 5; 6 raqamlaridan biri bilan tugashi
mumkin.
2) natural sonning beshinchi darajasi shu son qaysi raqam bilan
tugagan bo‘lsa, o‘sha raqam bilan
tugaydi.
