等比数列{an},a1*a12=5,求a8*a9*a10*a11=___.

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等比数列{an},a1*a12=5,求a8*a9*a10*a11=___.
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等比数列{an},a1*a12=5,求a8*a9*a10*a11=___.
等比数列{an},a1*a12=5,求a8*a9*a10*a11=___.

等比数列{an},a1*a12=5,求a8*a9*a10*a11=___.
这应该算不出来吧,如果把a1*a12=5改为a7*a12=5,就可以算了,如果改了的话,那答案就是25.