(2006•虹口区一模)解方程:x+2•2x+3−x=2
(2014•虹口区一模)函数f(x)=2sinπx与函数g(x)=3x−1
(2010•虹口区一模)已知函数f(x)=a2x+13x−1(a∈N),方程f(x)=-2x+7有两个根x1,x2,且x
(2014•虹口区一模)已知x:y=3:2,那么(x+y):x=______.
(2010•虹口区一模)已知函数f(x)=sin2x−23cos2x+3,x∈[π4,π2].
(2010•虹口区二模)先化简,再求值:(1−1x+2)÷x
(2012•虹口区二模)方程组x+y=1xy=−2
(2010•虹口区一模)已知二次函数y=x2+2x-3,解答下列问题:
(2012•虹口区一模)已知函数f(x)=sin(ωx+π4)
(2013•虹口区一模)设点P在曲线y=x2+2上,点Q在曲线y=x−2
(2013•虹口区一模)已知集合A={x|x2+2x-3<0},B={x||x-1|<2},则A∩B=______.
(2013•虹口区二模)直线x=1+2ty=1+t的倾斜角等于( )
(2013•虹口区二模)已知函数f(x)=x