且f(m2)>f(﹣m),
∴m2>﹣m,
即m2+m>0.
解得m<﹣1或m>0,
即m∈(﹣∞,﹣1)∪(0,+∞).
It was this exploring around problems and his ____(充满活力的) spirit that led to his most famous invention—the telephone in 1876.
2014年3月8日凌晨1时20分,载有239人的马来西亚航空公司执飞吉隆坡至北京的MH370航班在越南空中管制区失去通讯联络,同时失去雷达信号。此后不到6小时,消息传遍全球。人们最快获得此消息的渠道有可能是( )
求值:x(x+2y)﹣(x+1)2+2x,其中x=125,y=-25.