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

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

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

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

Ikki xonali musbat sonlarning yig‘indisi nechaga teng?

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

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

a,6,b arifmetik progressiyaning, a,4,b geometrik progressiyaning ketma−ket uchta hadi bo‘lsa, a2+b2 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 progressiyada a₆=37, a₁₅=100 bo‘lsa, progressiyaning dastlabki yigirma hadi yig‘indisi nechaga teng?

Arifmetik progressiyada S₅=40, \({\rm{a}}_8^2 - {\rm{a}}_2^2\)=504 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?

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

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

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?

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

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

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

8,11,14,…,56 progressiyaning hadlari 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 progressiyaning dastlabki n ta hadi yig‘indisi S_n=\(\frac{{\rm{n}}}{2}\)(3n+13) bo‘lsa, progressiyaning 8−hadi nechaga teng?

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

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

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

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