For+a+given+input+value+ \[v\],+the+function+ \[f\]+outputs+a+value+ \[u\]+to+satisfy+the+following+equation. \[u-5=-4(v-1)\] Write+a+formula+for+ \[f(v)\]+in+terms+of+ \[v\]. \[f(v)=\] 歌曲大全试听 MP3下载 - 第1页