博乐app

沙场点兵,解析:要使函数有意义,有,则故函数的定义域为值域为。

如果不加控制仍按这个比例发展下去,从2011年到2014年将有多少人发病?,《博乐app及其图像与性质(经典实用)》由会员分享,可在线阅读,更多相关《博乐app及其图像与性质(经典实用)(19页珍藏版)》请在人人文库网上搜索。

下面进行分类例析:在生活中的应用例1.保鲜时间因储藏温度的不同而不同,假定保鲜时间与储藏温度的关系为指数型函数,若牛奶放在0℃的冰箱中,保鲜时间是192h,而在22℃的厨房中则是42h,(1)写出保鲜时间y(h)关于储藏温度x(℃)的函数解析式;(2)利用(1)中结论,指出在30℃和16℃的保鲜时间(精确到1h);解析:(1)设此函数为y=kax,则它过(0,192)(22,42)两点,代入(0,192)可确定出k=192,再代入(22,42)点即42=192×a22,从而得到a=(7/32)(1/22),所以y=192(7/32)(x/。

例3、两个数a、b,规定a※b=a×b-(a+b),求12※(3※4),(12※3)※。

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