Arifmetik va geometrik progressiyalar — 10-sinf Algebra test savollari

1.Arifmetik progressiyada a₁=5, d=3 bo'lsa, a₂₀ ni toping.

• A)62
• B)59
• C)65
• D)60

2.Arifmetik progressiyada a₁=2, d=4 bo'lsa, S₁₀ ni toping.

• A)200
• B)180
• C)220
• D)190

3.Geometrik progressiyada b₁=3, q=2 bo'lsa, b₆ ni toping.

• A)96
• B)48
• C)192
• D)64

4.Cheksiz kamayuvchi geometrik progressiyada b₁$=4,q=\frac{1}{2}$ bo'lsa, yig'indisini toping.

• A)8
• B)4
• C)6
• D)16

5.Arifmetik progressiyada a₃=11, a₇=23 bo'lsa, d ni toping.

• A)3
• B)4
• C)2
• D)6

6.Geometrik progressiyada b₁=2, q=3 bo'lsa, S₄ ni toping.

• A)80
• B)40
• C)78
• D)82

7.Arifmetik progressiyada a₁=1, d=2 bo'lsa, dastlabki 10 ta hadning yig'indisini toping.

• A)100
• B)90
• C)110
• D)55

8.Arifmetik progressiyada a₅=17, d=3 bo'lsa, a₁ ni toping.

• A)5
• B)8
• C)2
• D)14

9.Geometrik progressiyada b₂=6, b₃=12 bo'lsa, b₁ ni toping.

• A)3
• B)2
• C)4
• D)6

10.Arifmetik progressiyaning n-hadi uchun to'g'ri formulani ko'rsating.

• A)aₙ=a₁+(n-1)d
• B)aₙ=a₁·$d^{n-1}$
• C)aₙ=a₁+nd
• D)aₙ=a₁-(n-1)d