M(4a+1,3a)在圆(x-1)(x-1)+Y×Y=9内部,求a取值范围

问题描述:

M(4a+1,3a)在圆(x-1)(x-1)+Y×Y=9内部,求a取值范围

圆(x-1)(x-1)+Y×Y=9圆心O为(1,0)
M在圆O内部,距离圆心小于半径3
(4a+1-1)^2+(3a)^225a^2-3/5