(2014•响水县二模)函数y=x−3
(2014•响水县二模)函数y=x−3
(2014•响水县二模)仔细阅读短文,并回答文后问题.
(2012•响水县一模)当x______时,式子x+3
(2014•响水县二模)(1)计算:(12)2-2sin60°+12; &
(2014•响水县二模)已知a+2b=43a+2b=8
(2014•四川二模)函数y=2x−1
(2014•文登市二模)已知变量x,y满足约束条件x+y≥2x−y≤20≤y≤3,若目标函数z=y+ax仅在点(5,3)
(2013•青岛二模)设变量x、y满足线性约束条件x+y≥3x−y≥−12x−y≤3,则目标函数z=log7(2x+3y
(2014•汕尾二模)在函数(1)y=ex-e-x,(2)y=2x−12x+1,(3)y=cosx•ln(x2+1−x)
(2011•绵阳二模)已知x,y满足线性约束条件:x−2y+3≥02x+y−9≤02x+6y−9≥0,若目标函数z=-x
(2014•合肥二模)为得到函数y=cos(2x+π3)的图象,只需将函数y=sin2x的图象( )
(2012•杨浦区二模)函数y=11−x