Ответ:
Объяснение:
aₙ = a₁ + d(n-1)
1. a₅= 2 + 5(5-1) = 2 + 20 = 22
2. a₇ = 3 - 2(7-1) = 3 - 12 = -9
3. a₆ = -18 + 3(6-1) = -18 + 15 = -3
4. a₁₁ = -10.5 - 5.5(11-1) = -10.5 - 55 = -65.5
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Ответ:
Объяснение:
aₙ = a₁ + d(n-1)
1. a₅= 2 + 5(5-1) = 2 + 20 = 22
2. a₇ = 3 - 2(7-1) = 3 - 12 = -9
3. a₆ = -18 + 3(6-1) = -18 + 15 = -3
4. a₁₁ = -10.5 - 5.5(11-1) = -10.5 - 55 = -65.5