翻译：
点P在y=5x+3直线上.已知坐标Q（3,- 2）.如果M是PQ的中点,则M一定在直线【y=5x-7】上.
不妨设P（a,5a+3）
则M横坐标x=(3+a)∕2,纵坐标y=(5a+3-2)∕2
即a=2x-3 a=（2y-1）∕5
所以2x-3=（2y-1）∕5
化简得：y=5x-7
所以点M一定落在y=5x-7这条直线上
Point P is on the line y=5x+3.The coordinates of point Q are
1个回答
相关问题
-
Sat数学题On a number line ,if point P has coordinate and point
-
第一题.on a number line,point M has coordinate -6.4 and point N
-
1,P is the point (7,5) and L1 is the line with equation 3x+4
-
求解一道AP微积分应用题!Find the point on the line -3x+4y+1=0 which is
-
一道英语奥数题The coordinates of the three points A,B,C on the plan
-
有关极坐标的求解If the rectangular coordinates of a point are given
-
"at the point of"与“on the point of"的区别.
-
英语翻译A POINT structure containing the x– and y–coordinates sp
-
英语翻译the vanishing point for any set of parallel lines is the
-
Alevel数学题?1.P is the point (7.5) and L1 is the line with equ