100.(有關(guān)數(shù)列極限的題目)
(1)計(jì)算:__________; (2)計(jì)算:___________;
(3)計(jì)算:___________;(4)若,則常數(shù)_________;
(5)_________; (6)數(shù)列的前項(xiàng)和為,則_________;
(7)若常數(shù)滿足,則___________;
(8)設(shè)函數(shù),點(diǎn)表示坐標(biāo)原點(diǎn),點(diǎn)(為正整數(shù)).
若向量,是與的夾角(其中),
設(shè),則_________;
99.過(guò)拋物線(為常數(shù)且)的焦點(diǎn)作拋物線的弦,則等于_________;
98.某企業(yè)在今年年初貸款,年利率為,從今年末開(kāi)始,每年末償還一定金額,預(yù)計(jì)年還清,
則每年應(yīng)償還的金額為_(kāi)_______________;
97.與圓相切且在坐標(biāo)軸上截距相等的直線有________條;
96.設(shè)平面向量,,若與的夾角為鈍角,則的取值范圍是_______________;
95.在△中,,,,則的值等于_________;
94.?dāng)?shù)列,,,,…,,…的前項(xiàng)和為_(kāi)__________________;
93.若不等式對(duì)恒成立,則的取值范圍是_____________;
92.對(duì)于任意的函數(shù),在同一坐標(biāo)系里,與的圖像關(guān)于__________對(duì)稱(chēng);
91.已知集合,,
若,則實(shí)數(shù)的值是_____________;
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