Ответ:
Объяснение:
a(n) = a(1) + (n-1)*d
10) a(12) = a(1) + 11*d = -16 + 11*9 = -16 + 99 = 83
11) a(11) = a(1) + 10*d => a(1) = a(11) - 10*d = -64 - 10*(-6) = -64 + 60 = -4
12) a(16) = a(1) + 15*d => d = (a(16) - a(1))/15 = (83 - (-22))/15 = 105/15 = 7
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Ответ:
Объяснение:
a(n) = a(1) + (n-1)*d
10) a(12) = a(1) + 11*d = -16 + 11*9 = -16 + 99 = 83
11) a(11) = a(1) + 10*d => a(1) = a(11) - 10*d = -64 - 10*(-6) = -64 + 60 = -4
12) a(16) = a(1) + 15*d => d = (a(16) - a(1))/15 = (83 - (-22))/15 = 105/15 = 7