30
1; 3; 7; 15;….; 2n-1 ketma-ketlikning dastlabki n ta hadining yig’indisini toping.
|
|
А)
|
4n+3n
|
|
В)
|
aniqlab bo’lmaydi.
|
|
С)
|
2n+n+1
|
|
D)
|
2(2n-1)-n
|
|
|
|
31
|
a2-b2=23 tenglikni qanoatlantiruvchi nechta (a;b) butun sonlar juftligi bor?
|
|
А)
|
2
|
|
В)
|
|
|
C)
|
4
|
|
D)
|
1
|
|
|
|
32
|
P(x) ko’phad uchun (x2+2)P(x)+ax+b=x7+2x5+3x4+3x3-2x+5 munosabat o’rinli bo’lsa, a+b=?
|
|
А)
|
23
|
|
В)
|
-23
|
|
С)
|
12
|
|
D)
|
9
|
|
|
|
33
|
Agar a+b+c=36 bo’lsa,  ifodaning eng katta qiymatini toping.
|
|
А)
|
35
|
|
В)
|
40
|
|
С)
|
41
|
|
D)
|
42
|
|
|
|
34
|
Agar arctga+arctgb+arctgc= bo’lsa, a+b+c=?
|
|
А)
|
0
|
|
В)
|
|
|
C)
|
abc
|
|
D)
|
ab/c
|
|
|
|
35
|
 funksiyaning eng katta qiymatini toping.
|
|
А)
|
4
|
|
В)
|
5
|
|
С)
|
6
|
|
D)
|
7
|
|
|
|
|
|
