解<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1608013936817a8bc55d275ee4633b203457dd6094caeimage38.png" style="width:49px;height:24px;"> =<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1608013936855b964f8d666434e9cb0d3af2d03477347image39.png" style="width:380px;height:77px;">(4分)<br/><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1608013936889ff9cc0c7914f4142bce28a0b50138b1dimage40.png" style="width:427px;height:77px;"><br/><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1608013936922daa96221d027441e89bc653893750e5cimage41.png" style="width:159px;height:75px;"> (8分)<br/><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16080139369961b05928419ea405783f942d3459958c7image42.png" style="width:15px;height:13px;"><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/160801393705218d269b6c9e8418aa64b4c028e9c685cimage43.png" style="width:113px;height:75px;"> (10分)<br/>
解 =(4分) (8分) (10分)