а)y12 = y1 + 11d = -9.9 + 11(1.8) = -9.9 + 19.8 = 9.9y20 = y1 + 19d = -9.9 + 19(1.8) = -9.9 + 34.2 = 24.3
б)y12 = y1 + 11d = 10 + 11(-0.2) = 10 - 2.2 = 7.8y20 = y1 + 19d = 10 + 19(-0.2) = 10 - 3.8 = 6.2
а)
y12 = y1 + 11d = -9.9 + 11(1.8) = -9.9 + 19.8 = 9.9
y20 = y1 + 19d = -9.9 + 19(1.8) = -9.9 + 34.2 = 24.3
б)
y12 = y1 + 11d = 10 + 11(-0.2) = 10 - 2.2 = 7.8
y20 = y1 + 19d = 10 + 19(-0.2) = 10 - 3.8 = 6.2