如图,l1,l2分别表示一种白炽灯和一种节能灯的费用y(费用=灯的售价+电费,单位:元)与照明时间x(h)的函数图象,假设两种灯的使用寿命都是2000h,照明效果一样.(1)根据图象分别求出l1,l2
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/02 23:45:44
![如图,l1,l2分别表示一种白炽灯和一种节能灯的费用y(费用=灯的售价+电费,单位:元)与照明时间x(h)的函数图象,假设两种灯的使用寿命都是2000h,照明效果一样.(1)根据图象分别求出l1,l2](/uploads/image/z/5906859-51-9.jpg?t=%E5%A6%82%E5%9B%BE%2Cl1%2Cl2%E5%88%86%E5%88%AB%E8%A1%A8%E7%A4%BA%E4%B8%80%E7%A7%8D%E7%99%BD%E7%82%BD%E7%81%AF%E5%92%8C%E4%B8%80%E7%A7%8D%E8%8A%82%E8%83%BD%E7%81%AF%E7%9A%84%E8%B4%B9%E7%94%A8y%EF%BC%88%E8%B4%B9%E7%94%A8%3D%E7%81%AF%E7%9A%84%E5%94%AE%E4%BB%B7%2B%E7%94%B5%E8%B4%B9%2C%E5%8D%95%E4%BD%8D%EF%BC%9A%E5%85%83%EF%BC%89%E4%B8%8E%E7%85%A7%E6%98%8E%E6%97%B6%E9%97%B4x%EF%BC%88h%EF%BC%89%E7%9A%84%E5%87%BD%E6%95%B0%E5%9B%BE%E8%B1%A1%2C%E5%81%87%E8%AE%BE%E4%B8%A4%E7%A7%8D%E7%81%AF%E7%9A%84%E4%BD%BF%E7%94%A8%E5%AF%BF%E5%91%BD%E9%83%BD%E6%98%AF2000h%2C%E7%85%A7%E6%98%8E%E6%95%88%E6%9E%9C%E4%B8%80%E6%A0%B7%EF%BC%8E%EF%BC%881%EF%BC%89%E6%A0%B9%E6%8D%AE%E5%9B%BE%E8%B1%A1%E5%88%86%E5%88%AB%E6%B1%82%E5%87%BAl1%2Cl2)
xTn@2JlGi|?ѮXD-j7PBT# mmvf/;ݶR"{c>"WqRc+DKntXskS{^D쓸vMX]8Dw#+a+4/I243XϳdivQE 9ah"jΰM8ؚC қ"a"IRJXi}4*+Oh+(pt'3t|g?]
b
֧Q9 I]fyMtQcd@C4Cf՝jeuCU!COĪ:ɬp)v62K*z/e(FO4>A9_N|¥`H~>U2kܥF\^4Mfp(;$7.2O@CZdYH}>J31l[nD]! %vWes776x$#
7ƦVr[UlN5$zRk$C{iߔ#wmn&:tO,0~&