Question

如图,直线y=kx+b和y=mx+n交于点P（3,-2）,则不等式kx+b

Answer 1

y= kx+b

(3,-2)

=> -2=3k+b (1)

y= mx+n

(3,-2)

=> -2=3m+n (2)

(2)-(1)

n-b +3(m-k) = 0

n-b = 3(k-m)

kx+bm,=> xm,=> x>3