【单选题】
img class=kfformula src=zzximg/20190808/1565256388580621.png data-latex={25}^{\frac {3} {2}}=/( )
【单选题】
<img class="kfformula" src="20190808/1565256388580621.png" data-latex="{25}^{\frac {3} {2}}="/>( )
【单选题】
img class=kfformula src=zzximg/20190808/1565256537299613.png data-latex=\left ( {{log}_{3}2} \right )\cdot \left ( {{log}_{2}27} \right )=/( )
【单选题】
<img class="kfformula" src="20190808/1565256537299613.png" data-latex="\left ( {{log}_{3}2} \right )\cdot \left ( {{log}_{2}27} \right )="/>( )
【单选题】
已知img class=kfformula src=zzximg/20190809/1565322050560879.png data-latex=A\left ( {0,-2} \right )/img class=kfformula src=zzximg/20190809/1565322050489966.png data-latex=B\left ( {x,6} \right )/的中点坐标为img class=kfformula src=zzximg/20190809/1565322050782302.png data-latex=\left ( {-1,y} \right )/img class=kfformula src=zzximg/20190809/1565322050701271.png data-latex=x/img class=kfformula src=zzximg/20190809/1565322050277662.png data-latex=y/的值分别为( )
①
img class=kfformula src=zzximg/20190809/1565322050607462.png data-latex=x=2,y=4/
②
img class=kfformula src=zzximg/20190809/1565322050205695.png data-latex=x=-2,y=2/
③
img class=kfformula src=zzximg/20190809/1565322050358526.png data-latex=x=-4,y=-2/
④
img class=kfformula src=zzximg/20190809/1565322050656212.png data-latex=x=-4,y=25/
【单选题】
img class=kfformula src=zzximg/20190808/1565256297772060.png data-latex=\sqrt {\left ( {lg5-1} \right )^{2}}/的值等于( )
①
img class=kfformula src=zzximg/20190808/1565256297148379.png data-latex=lg5-1/
②
img class=kfformula src=zzximg/20190808/1565256297764160.png data-latex=lg5/
③
img class=kfformula src=zzximg/20190808/1565256297303551.png data-latex=lg2/
④
img class=kfformula src=zzximg/20190808/1565256297983776.png data-latex=lg\frac {1} {5}/
【单选题】
二次函数img class=kfformula src=zzximg/20190808/1565254258613538.png data-latex=y={x}^{2}+mx+6/的顶点img class=kfformula src=zzximg/20190808/1565254258861129.png data-latex=\left ( {-1,5} \right )/img class=kfformula src=zzximg/20190808/1565254258615064.png data-latex=m/的值为( )
【单选题】
两条平行直线img class=kfformula src=zzximg/20190809/1565322829875215.png data-latex=3x+4y-7=0/img class=kfformula src=zzximg/20190809/1565322829154016.png data-latex=3x+4y+8=0/之间的距离是( )
①
img class=kfformula src=zzximg/20190809/1565322829833725.png data-latex=\frac {1} {5} width=87 height=63/
②
img class=kfformula src=zzximg/20190809/1565322829406438.png data-latex=15/
③
img class=kfformula src=zzximg/20190809/1565322829721740.png data-latex=3\sqrt {2}/
④
img class=kfformula src=zzximg/20190809/1565322829886592.png data-latex=3/
【单选题】
函数img class=kfformula src=zzximg/20190808/1565253438624934.png data-latex=y=2-{x}^{2}/的单调递减区间是( )
①
img class=kfformula src=zzximg/20190808/1565253438117832.png data-latex=\left ( {0,+\infty } \right )/
②
img class=kfformula src=zzximg/20190808/1565253438467999.png data-latex=\left ( {-\infty ,0} \right )/
③
img class=kfformula src=zzximg/20190808/1565253438403956.png data-latex=\left ( {-\infty ,-1} \right )/
④
img class=kfformula src=zzximg/20190808/1565253438303182.png data-latex=\left ( {-1,+\infty } \right )/
【单选题】
等差数列<img class="kfformula" src="20190809/1565317844150977.png" data-latex="\left \{ {{a}_{n}} \right \} "/>的首项<img class="kfformula" src="20190809/1565317844698638.png" data-latex="{a}_{1}=-2"/>,<img class="kfformula" src="20190809/1565317844536248.png" data-latex="{S}_{3}=3"/>,那么( )
①
<img class="kfformula" src="20190809/1565317844862924.png" data-latex="d=3"/>
②
<img class="kfformula" src="20190809/1565317844935823.png" data-latex="d=2"/>
③
<img class="kfformula" src="20190809/1565317844903124.png" data-latex="d=-2"/>
④
<img class="kfformula" src="20190809/1565317844953331.png" data-latex="d=-3"/>
【单选题】
在数列img class=kfformula src=zzximg/20190809/1565316783973080.png data-latex=\left \{ {{a}_{n}} \right \} /中,前img class=kfformula src=zzximg/20190809/1565316783992384.png data-latex=n/项和公式是img class=kfformula src=zzximg/20190809/1565316783683277.png data-latex={s}_{n}=4{n}^{2}-n/,那么img class=kfformula src=zzximg/20190809/1565316783325652.png data-latex={a}_{2}/为( )