设等比数列{an}的公比q = ,前n项和为Sn,则 = ____▲_______.
设集合,则=____▲_______.
阅读下列算法语句:
Read S1
For I from 1 to 5 step 2
SS+I
End for
Print S
End
输出的结果是 ▲ .
抛物线y2 = 8x的焦点到双曲线 – = 1的渐近线的距离为___▲___.
已知,则___▲_____.
设复数满足(是虚数单位),则复数的模=___▲____.