C(3,0) D(0,2) 求出LAB的斜率为-2/3 则 LCD斜率也应为-2/3,设 C(c,0) D (0,d) 得KLCD =(-d)/c =-2/3 ,又AB长为13^1/2 则CD也为13^1/2,即C(3,0) D(0,2)
2:(1)C(3,0) D(0,2) (2)C(-3,0) D(0,-2)
C(3,0) D(0,2) 求出LAB的斜率为-2/3 则 LCD斜率也应为-2/3,设 C(c,0) D (0,d) 得KLCD =(-d)/c =-2/3 ,又AB长为13^1/2 则CD也为13^1/2,即C(3,0) D(0,2)
2:(1)C(3,0) D(0,2) (2)C(-3,0) D(0,-2)