中視聶小倩線上看 , 聶小倩線上看第二集 , 聶小倩 中視 , 聶小倩電視劇 , 聶小倩

x: 丁丁的年齡
y: 他兒子的年齡
z: 他女兒的年齡

x(t) = 40 ==> y(t) = 2(z(t)
z(t') = 28 ==> x(t') = 2*y(t')
所以 x(t') = x(t)+(t'-t) = 2y(t') = 2(y(t)+t'-t) = 2y(t)+2(t'-t) = 4z(t)+2(t'-t)
x(t) = 40 故 40+(t'-t) = 4z(t)+2(t'-t)
所以 z(t) = 10 - (t'-t)/4;  y(t) = 20 -(t'-t)/2

年齡都取整數, 所以 t'-t 是 4 的的倍數.

z(t') = 28 = z(t)+(t'-t) = 10+3(t'-t)/4, 所以 t'-t = 24

所以:
時間 t 時 x(t) = 40, y(t) = 8, z(t) = 4
時間 t' 時 x(t) = 64, y(t) = 32, z(t) = 28

而 z(t") = 23 時 t"-t = 19, 或 t" = t-5.
故
x(t") = 59, y(t") = 27.

丁丁59歲, 當他的女兒23歲.

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