Question

𝟗𝟓 𝐒𝐭𝐮𝐝𝐠𝐫𝐚𝐦™

數學B2

,茲民 | 4 設國數1D =2。/C2》二4,/3) 6,

2當攝        Cl 宮和3 同   則光 廬上 (40分

Answer 1

✨ 最佳解答 ✨

Ny-Ålesund

有點複雜。

f(1) = 2
f(2) = 4
f(3) = 6
f(2x+3) = f(x) + 7

f(45) if 2x+3 = 45, x = 21
f(45) = f(21) + 7

f(21) if 2x+3 = 21, x = 9
f(21) = f(9) + 7

f(9) if 2x+3 = 9, x = 3
f(9) = f(3) + 7 = 6 + 7 = 13

依序套回去
f(21) = f(9) + 7 = 13 + 7 = 20
f(45) = f(21) + 7 = 20 + 7 = 27

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