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✨ Jawaban Terbaik ✨

所求 = 200000 × [ (1.0158)⁵ - (1.0138)⁵ ]

f(x) = x⁵
f'(x) = 5x⁴
令 x = 1.0138 , x+h = 1.0158
⇒ h = 0.002

f(1.0158) - f(1.0138) ≈ f'(1.0138) · 0.002
(1.0158)⁵ - (1.0138)⁵ ≈ 5 · (1.0138)⁴ · 0.002

所求 ≈ 200000 × [ 5 · (1.0138)⁴ · 0.002 ]
≈ 200000 × 0.01 × 1.0564
= 2000 × 1.0564
= 2112.8
≈ 2113

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