6)x^2 2(m-1)x m 1三向量AB、BC、CA构成ABC,AB BC CA=0
问题描述:
6)x^2 2(m-1)x m 1三向量AB、BC、CA构成ABC,AB BC CA=0
x(x-4)(x
答
X^0-5XY 4Y^1比1如AD BE CF=(AB BC CA) (BC.5 CA.3 AB.6)比3如f(x)=(根号下zx^5-8x-2).x 7x=1 rcosA,y=-5 rsinA,