把直線y=4-2x繞著坐標原點向逆時針方向旋轉(zhuǎn)90°后得到的直線的函數(shù)解析式是?
把直線y=4-2x繞著坐標原點向逆時針方向旋轉(zhuǎn)90°后得到的直線的函數(shù)解析式是?
數(shù)學人氣：707 ℃時間：2020-04-18 12:37:32
優(yōu)質(zhì)解答
從原函數(shù)上隨便找一點如A（4,0）,旋轉(zhuǎn)后它被轉(zhuǎn)到點B（0,4）則點必在所得直線上.因為逆時針旋轉(zhuǎn)九十度,故它們斜率之積為-1所以所得直線斜率k=0.5由點B及斜率k可求出其點斜式為y=0.5x+4
我來回答
類似推薦
- 已知y+5與x成正比例,且當x=-3時,y=-11
- 若函數(shù)y=f（x）的圖象可由函數(shù)y=lg（x+1）的圖象繞坐標原點O逆時針旋轉(zhuǎn)90°得到，則f（x）=（ ?。?A.10-x-1 B.10x-1 C.1-10-x D.1-10x
- 將函數(shù)F(x)=10^x的圖像繞著原點逆時針旋轉(zhuǎn)90度得到函數(shù)y=g(x)的圖像,則函數(shù)g(x)=
- 一次函數(shù)y=x的圖象繞坐標原點逆時針方向旋轉(zhuǎn)90°后得到的圖象對應的函數(shù)解析式為_．
- 求直線y=2x,y=2x-2繞坐標原點逆時針旋轉(zhuǎn)90度得到的直線解析式,
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運嗎
- 6邊長為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機械分析天平TG628A的使用說明書
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as