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题型:单选题 题类:常考题 难易度:普通
上海市曹杨二中2019-2020学年高二上学期数学10月月考试卷
64个正数排成8行8列,如图所示:在符号aij(1≤i≤8,1≤j≤8)中,i表示该数所在的行数,j表示该数所在的列数.已知每一行都成等差数列,而每一列都成等比数列(且每列公比都相等).若a11= , a24=1,a32= . 则a81a82…a88…aij={#blank#}1{#/blank#} .
(sin )﹣2+(sin )﹣2= ×1×2;
(sin )﹣2+(sin )﹣2+(sin )﹣2+sin( )﹣2= ×2×3;
(sin )﹣2+(sin )﹣2+(sin )﹣2+…+sin( )﹣2= ×3×4;
(sin )﹣2+(sin )﹣2+(sin )﹣2+…+sin( )﹣2= ×4×5;
…
照此规律,
(sin )﹣2+(sin )﹣2+(sin )﹣2+…+(sin )﹣2={#blank#}1{#/blank#}.
按照上面的规律,第 个“金鱼”图需要火柴棒的根数为( )
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