Arifmetik progressiyaning dastlabki n ta hadi yig‘indisi S_n=\(\frac{{\rm{n}}}{2}\)(3n+13) bo‘lsa, progressiyaning 8−hadi nechaga teng?

Birlar xonasi 4 bo‘lgan uch xonali sonlarning yig‘indisi nechaga teng?

13 bilan 157 orasiga 15 ta had joylashtirilsa, arifmetik progressiya tashkil qiladi. Joylashtirilgan birinchi had nechaga teng?

lg8, a, lg125 arifmetik progressiyaning ketma−ket uchta hadi bo‘lsa, a nechaga teng?

Arifmetik progressiyada S₅=40, \({\rm{a}}_8^2 - {\rm{a}}_2^2\)=504 bo‘lsa, progressiyaning ayirmasi nechaga teng?

a+3, 2a+7, 3b+4 ham arifmetik, ham geometrik progressiya bo‘lsa, b nechaga teng?

a+b, 3ab, 4ab² ham arifmetik, ham geometrik progressiya bo‘lsa, progressiyaning birinchi hadi nechaga teng?

O‘suvchi geometrik progressiyaning dastlabki 12 ta hadi yig‘indisining, dastlabki 6 ta hadi yig‘indisiga nisbati 65 bo‘lsa, bu progressiyaning maxraji nechaga teng?

−13 bilan 67 orasiga arifmetik tashkil qiladigan 19 ta had joylashtirilsa, progressiyaning beshinchi
hadi nechaga teng bo‘ladi?

−5+8−11+14−…−77 yig‘indi nechaga teng?

Birinchi hadi 8 bo‘lgan arifmetik progressiyaning dastlabki yigirma to‘rt hadi yig‘indisi 1848 bo‘lsa, progressiyaning ayirmasi nechaga teng?

Arifmetik progressiyaning dastlabki n ta hadi yig‘indisi S_n=2n²+9n bo‘lsa, progressiyaning 6−hadi nechaga teng?

Arifmetik progressiyaning 5−hadi 23, 12−hadi 65 bo‘lsa, ayirmasi nechaga teng?

a_n=3n−5 progresiyaning dastlabki 10 ta hadi yig‘indisi nechaga teng?

Arifmetik progressiyaning 9−hadi 35, 23−hadi 91 bo‘lsa, progressiyaning umumiy hadi quyidagilardan qaysi biri?

Geometrik progressiyada b₅=1, b₉=\(\frac{1}{{16}}\) bo‘lsa, b₂₀ nechaga teng?

a₇=−4, a₁₂=51 bo‘lsa, progressiyaning dastlabki o‘n beshta hadi yig‘indisi nechaga teng?

a_n=n+3 progressiyaning dastlabki 20 ta hadi yig‘indisi nechaga teng?

Arifmetik progressiyada a₄=a, a₁₃=b bo‘lsa, progressiyaning umumiy hadi quyidagilardan qaysi biri?

Arifmetik progressiyada a₆=37, a₁₅=100 bo‘lsa, progressiyaning dastlabki yigirma hadi yig‘indisi nechaga teng?

Arifmetik progressiyaning 10−hadi 53, 19−hadi 98 bo‘lsa, progressiyaning 30−hadi nechaga teng?

8,11,14,…,56 progressiyaning hadlari yig‘indisi nechaga teng?

Arifmetik progressiyada a₁=−3, S₁₈−S₆=240 bo‘lsa, a₂₀ nechaga teng?

Arifmetik progressiyada a₆=21, a₁₅=57 bo‘lsa, a₂₄ nechaga teng?

Dastlabki n ta hadi yig‘indisi \(\frac{{{\rm{n}}\left( {7{\rm{n}} + 3} \right)}}{2}\) bo‘lgan arifmetik progressiyaning ayirmasi nechaga teng?

Arifmetik progressiyaning dastlabki 15 ta hadi yig‘indisi 645 bo‘lsa, a₅+a₁₁ yig‘indi nechaga teng?

a,6,b arifmetik progressiyaning, a,4,b geometrik progressiyaning ketma−ket uchta hadi bo‘lsa, a2+b2 yig‘indi nechaga teng?

Dastlabki n ta hadi yig‘indisi 3ⁿ−1 bo‘lgan geometrik progressiyaning nechanchi hadi 1458 ga teng?

Ikki xonali musbat sonlarning yig‘indisi nechaga teng?

3 bilan 115 orasiga 13 ta had joylashtirilganda hosil bo‘ladigan arifmetik progressiyaning 5−hadi nechaga teng?