一张照片是题目，一张照片是我的过程，恳请各位数学先进帮帮忙了
[moptt_image_upload:file:///storage/emulated/0/Pictures/MoPTT/capture_1509265298393.jpg result:https://i.imgur.com/oD0x4mz.jpg]
[moptt_image_upload:file:///storage/emulated/0/Pictures/MoPTT/capture_1509265311756.jpg result:https://i.imgur.com/nro5A5C.jpg]