✨ 最佳解答 ✨
y = (90000 + 2000x)(60 - 12x)
= -24,000x^2 - 960,000x + 5,400,000
= -24,000(x + 20)^2 + 15,000,000
Price = 90,000 + 2,000*(-20) = 50,000
✨ 最佳解答 ✨
y = (90000 + 2000x)(60 - 12x)
= -24,000x^2 - 960,000x + 5,400,000
= -24,000(x + 20)^2 + 15,000,000
Price = 90,000 + 2,000*(-20) = 50,000
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