1)p=30+x2)Q=(30+x)X(1000-10x)=-10x²+700x+300003设总利润为Y则Y等锋陆于银搜顷10x×20+Q+400x-1000x30=10x×20 -10x²+700x+30000-400x-30000=200x-10x²+700x+30000-400x-30000=-10x²+500x-b/2a=25所以当放漏搏养到第25天时利润最大为-10X625+500X25=1250元