高中数学
高中数学选修全套教案浅谈高中数学教学策略高中数学解析几何题型高中数学10种解题方法高中数学必修4知识点
《不等式》题库精选[基础训练A组]一、选择题1下列各式中,最小值等于的是()ABCD2若且满足,则的最小值是()ABCD3设,,则的大小关系是()ABCD4若,且恒成立,则的最小值是()ABCD5函数的最小值为()ABCD6不等式的解集为()ABCD二、填空题1若,则的最小值是_____________2若,则,,,按由小到大的顺序排列为3已知,且,则的最大值等于_____________4设,则与的大小关系是_____________5函数的最小值为_____________三、解答题1已知,求证:2解不等式3求证:4证明:数学选修4-5不等式选讲参考答案[基础训练A组]一、选择题1D2D3B,即4B,,而,即恒成立,得5A6D,得二、填空题12由糖水浓度不等式知,且,得,即345三、解答题1证明:另法一:另法二:即,2解:原不等式化为当时,原不等式为得,即;当时,原不等式为得,即;当时,原不等式为得,与矛盾;所以解为3证明:4证明:PAGE1_1234567921.unknown_1234567953.unknown_1234567969.unknown_1234567977.unknown_1234567985.unknown_1234567989.unknown_1234567993.unknown_1234567995.unknown_1234567997.unknown_1234567998.unknown_1234567999.unknown_1234567996.unknown_1234567994.unknown_1234567991.unknown_1234567992.unknown_1234567990.unknown_1234567987.unknown_1234567988.unknown_1234567986.unknown_1234567981.unknown_1234567983.unknown_1234567984.unknown_1234567982.unknown_1234567979.unknown_1234567980.unknown_1234567978.unknown_1234567973.unknown_1234567975.unknown_1234567976.unknown_1234567974.unknown_1234567971.unknown_1234567972.unknown_1234567970.unknown_1234567961.unknown_1234567965.unknown_1234567967.unknown_1234567968.unknown_1234567966.unknown_1234567963.unknown_1234567964.unknown_1234567962.unknown_1234567957.unknown_1234567959.unknown_1234567960.unknown_1234567958.unknown_1234567955.unknown_1234567956.unknown_1234567954.unknown_1234567937.unknown_1234567945.unknown_1234567949.unknown_1234567951.unknown_1234567952.unknown_1234567950.unknown_1234567947.unknown_1234567948.unknown_1234567946.unknown_1234567941.unknown_1234567943.unknown_1234567944.unknown_1234567942.unknown_1234567939.unknown_1234567940.unknown_1234567938.unknown_1234567929.unknown_1234567933.unknown_1234567935.unknown_1234567936.unknown_1234567934.unknown_1234567931.unknown_1234567932.unknown_1234567930.unknown_1234567925.unknown_1234567927.unknown_1234567928.unknown_1234567926.unknown_1234567923.unknown_1234567924.unknown_1234567922.unknown_1234567905.unknown_1234567913.unknown_1234567917.unknown_1234567919.unknown_1234567920.unknown_1234567918.unknown_1234567915.unknown_1234567916.unknown_1234567914.unknown_1234567909.unknown_1234567911.unknown_1234567912.unknown_1234567910.unknown_1234567907.unknown_1234567908.unknown_1234567906.unknown_1234567897.unknown_1234567901.unknown_1234567903.unknown_1234567904.unknown_1234567902.unknown_1234567899.unknown_1234567900.unknown_1234567898.unknown_1234567893.unknown_1234567895.unknown_1234567896.unknown_1234567894.unknown_1234567891.unknown_1234567892.unknown_1234567890.unknown