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题型:填空题 题类:常考题 难易度:普通
2015-2016学年湖北省孝感市五校教学联盟高二下学期期末数学试卷(理科)
1+ < ,1+ + < ,1+ + + < ,…
据以上式子可以猜想:1+ + + +…+ <.
(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#}.
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