Alevel数学题?
1.Pisthepoint(7.5)andL1isthelinewithequation3x+4y=16
(1).FindouttheequationofthelineL2whichpassesthroughPandisperpendiculartoL2.
(2).FindthepointofintersectionoftheL1andL2.
(3).FindtheperpendiculardistanceofPfromthelineL1.