1 . 如图,
,
是
延长线上一点,
,求证:
是
的角平分线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e74c42442cd4506a5fa92b2209903c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027d53067b9649fe91f43c30584700c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2 . (1)解不等式
,并把它的解集在数轴上表示出来.
,并写出它的所有整数解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9766903941b721d5702a8ac23e180e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c67d5ec8f463d70905b50b39edb938.png)
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3 . 已知一次函数
,完成下列问题:
(1)求在这个函数图象上且位于x轴上方的所有点的横坐标的取值范围;
(2)求经过点
,且平行于直线
的一次函数的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/556a9bd8530866e7a5c2f0a5c27f83b0.png)
(1)求在这个函数图象上且位于x轴上方的所有点的横坐标的取值范围;
(2)求经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a84ce047387d00e506351deb1e35d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/556a9bd8530866e7a5c2f0a5c27f83b0.png)
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4 . 根据公式
(其中n为正整数,且
).计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af9be25735de90824734d5bc25327c4.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbd1f20f18f8a21e0dcc9080ed24104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af9be25735de90824734d5bc25327c4.png)
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5 . 如图,
,
,
,
平分
交
于点
,试说明
.请完善解答过程,并在括号内填写相应的理论依据.
(已知),
∴
________
(________),
∵
(已知),
∴
(________),
∵
(已知),
∴
________
(________),
∴
(________),
∵
平分
(已知),
∴
(________),
∴
(等量代换),
∴
(________).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597bbee9476e853b2dbd7f30f367444e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207c37b4e9eb8c53fd2ae13c7afe92dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432aca761e9fa97d3728a8038de81e5a.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597bbee9476e853b2dbd7f30f367444e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc0f6d07dfb7c1a4de9f0ecf8c60370.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c145919ebf3657c5e5682b9a78eb1ab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e519cdb0cac3981d8e9610dba507a3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfd2ca166ea7c7b7050dc5f1924092b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9eb000c46cc20303695b2e833976cb.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d25ddcd17f9de36605363fe32c361b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
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6 . 解方程组:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3800d9241f1ee021f167e7caa9984a0f.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3800d9241f1ee021f167e7caa9984a0f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cbebc7f60928ee4b851bd29b882c04.png)
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7 . 定义:若有序数对
满足二元一次方程
(
、
为不等于0的常数),则称
为二元一次方程
的数对解.例如:有序数对
满足
,则称
为
的数对解.若有序数对
是二元一次方程
的一个数对解,且
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881fe2df23c5a0fe1d1fecbe9ffa55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec6586f1307018630c0803b329341cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881fe2df23c5a0fe1d1fecbe9ffa55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec6586f1307018630c0803b329341cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2805726a6ee2d02d5001a15faca0aeeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74e452c91ffef07a4f979dc212f1559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
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8 . 已知关于
,
的不等式组
,其中
,
满足
,则
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9c0989f6bd88ea61e13b135d9c7fda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec8cb29e099dbb00eee7f61b4adee16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 .
的
与6的差不小于5,用不等式表示为:_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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