Sonli ketma-ketliklar — 9-sinf Algebra test savollari

1.an = 3n - 1 formula bilan berilgan ketma-ketlikning 10-hadini toping.

• A)29
• B)30
• C)28
• D)27

2.a1 = 2, a(n+1) = a(n) + 3 rekurrent formula bilan berilgan ketma-ketlikning 5-hadini toping.

• A)14
• B)11
• C)17
• D)12

3.an = n² - 1 ketma-ketlikning qaysi hadi 24 ga teng?

• A)5-had
• B)6-had
• C)4-had
• D)25-had

4.a1 = 1, a2 = 1, a(n+2) = a(n+1) + a(n) ketma-ketlikning 6-hadini toping.

• A)8
• B)5
• C)13
• D)6

5.an = (-1)ⁿ·n formula bilan berilgan ketma-ketlikning a7 va a8 yig'indisini toping.

• A)1
• B)-1
• C)15
• D)-15

6.an = 2n + 1 formula bilan berilgan ketma-ketlikning 4-hadini toping.

• A)9
• B)7
• C)8
• D)10

7.an = 5 - n formula bilan berilgan ketma-ketlikning 3-hadini toping.

• A)2
• B)3
• C)1
• D)4

8.a1 = 4, a(n+1) = 2a(n) rekurrent formula bilan berilgan ketma-ketlikning 3-hadini toping.

• A)16
• B)8
• C)32
• D)12

9.an $=\frac{n}{n+1}$ ketma-ketlikning a3 hadini toping.

• A)$\frac{3}{4}$
• B)$\frac{1}{4}$
• C)$\frac{2}{3}$
• D)$\frac{4}{5}$

10.Ketma-ketlikning umumiy hadi qanday belgilanadi?

• A)an
• B)Sn
• C)Δn
• D)Pn