23题,求完整答案,麻烦各位帮我解一下,要详细答案Ƕ

2024-12-27 05:25:21
推荐回答(2个)
回答1:

y=(x-70-60)(3000-10x)

回答2:

(1)令函数表达式y=kx+b
{70k+b=3000
{90k+b=1000
k=-100,b=10000
y=-100x+10000

(2)w=(x-60)(-100x+10000)
=-100x²+16000x-600000
=-100(x-80)²+40000
当x=80元,利润最大,为40000元