R
=xp
=(800-8p)p
=800p-8p²
=-8(p²-100p)
=-8(p²-100p+2500-2500)
=-8(p-50)²-8*(-2500)
=-8(p-50)²+20000
所以,当=50时,能使销售收入最大,为20000.
R
=xp
=(800-8p)p
=800p-8p²
=-8(p²-100p)
=-8(p²-100p+2500-2500)
=-8(p-50)²-8*(-2500)
=-8(p-50)²+20000
所以,当=50时,能使销售收入最大,为20000.