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x2﹣x﹣1=0 x2+3x+2=0 2015x2+11x﹣20=0 x2+x+2=0
={x|x2﹣11x﹣26<0}, ={x|x=4n+3,n∈N.},则A.∩B.的元素个数为( ) A.1B.2 3 4
x2+10x+11=0 x2+10x﹣11=0 x2+11x﹣10=0 x2﹣11x﹣10=0
4031x2015 4030x2016 4029x2015 4031x2016
2x+3 x2(11x﹣7) x5(11x﹣3) x6(2x+7)
39x10 ﹣39x10 ﹣43x10 43x10
2015x2015. 4029x2014. 4029x2015. 4031x2015.
={x11≤x≤5},Z为整数集,则集合A.∩Z.中元素的个数是 A.6 5 4 3
/etc/X11/xorg.conf /etc/X11/XF86config /etc/xorg.conf /etc/XF86config
x2+x+2=0 x2+3x+2=0 2015x2+11x﹣20=0 x2﹣x﹣1=0
9x﹣5=11x﹣9 8x+3=3﹣5x 5x﹣1=5+7x 3x﹣1=5x﹣7