⑴____ grass glass
⑵____ grandma great
⑶____ green clean
⑷____ angry hungry
⑸____ grow grade
观察下列各不等式:
1+122<32,
1+122+132<53,
1+122+132+142<74,1+122+132+142+152<95
…
已知函数f(x)=1,x≤01x,x>0,则使方程x+f(x)=m有解的实数m的取值范围是( )