ա․ 2, 5, 8, 11, 14
բ․ -2, -10, -50, -250, -1250
գ․ 4, -4, -12, -20, -28
դ․ 8, 2, 0.5, 0.125, 0,03125

ա․ 40
բ․ 0.25
գ․ -2

ա․ a₁ = 5, a₂ = 10, a₃ = 15
բ․ b₁ = 9, b₂ = 3, b₃ = 1
գ․ c₁ = -0.5, c₂ = 0.25, c₃ = -0.125