设am属于R,fx=x^2+(a-1)x+1,gx=m*x^2+ax+m/4若对一切实数x满足fx>0是对一切实数x,gx>0的充分条件求实...设am属于R,fx=x^2+(a-1)x+1,gx=m*x^2+ax+m/4若对一切实数x满足fx>0是对一切实数x,gx>0的充分条件求实数取值

Question

设a m属于R,fx=x^2+(a-1)x+1,gx=m*x^2+ax+m/4若对一切实数x满足fx>0是对一切实数x,gx>0的充分条件求实...
设a m属于R,fx=x^2+(a-1)x+1,gx=m*x^2+ax+m/4若对一切实数x满足fx>0是对一切实数x,gx>0的充分条件求实数取值范围

Answer 1

对一切实数x满足fx=x^2+(a-1)x+1>0是对一切实数x
得判别式,（a-1)^2-4=a^2-2a-3=(a-3)(a+1)>0
a>3或a0
得判别式,a^2-m^2>0
m^2