如图，在平面直角坐标系中，点<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/70373dc0f08647cfa6e5665802f3ed07.png" style="width: 20.8;height: 27.7;" width="20.8" height="27.7">,<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/522d67608fd6464ca4431bb9976b7d4c.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">,<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/b7761525b24640719e2e61fa811c8e10.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">……<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/821cb7e0e42e40c88afb55b687dd14f7.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">在<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/940fc2f92910497c97fa45323861785e.png" style="width: 15.6;height: 17.3;" width="15.6" height="17.3">轴上，<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/8b6af4c124cb4944929bb09632c11287.png" style="width: 20.8;height: 27.7;" width="20.8" height="27.7">,<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/76287287444e48d8a5e180a925f628c8.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">,<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/ab20fd5aee134e2e83b44d5b50a0f17e.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">……<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/bf573f58756b49fe851ce4c90f9b7a37.png" style="width: 24.2;height: 27.7;" width="24.2" height="27.7">在直线<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/f36b8f6426444fc5a509e1fa8df8c574.png" style="width: 72.7;height: 53.6;" width="72.7" height="53.6">上，若<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/89bb8a02c9454544b10ecee1ca139413.png" style="width: 60.5;height: 29.4;" width="60.5" height="29.4">且<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/3d6efe3658304066a7da9339894ebadb.png" style="width: 70.9;height: 27.7;" width="70.9" height="27.7">，<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/ca660ef6e13c4c90ae0645a7de71027c.png" style="width: 74.4;height: 27.7;" width="74.4" height="27.7">……<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/ae556ec4f9ac411a9bf0fa7967954dce.png" style="width: 88.2;height: 27.7;" width="88.2" height="27.7">都是等边三角形，从左到右的小三角形（阴影部分）面积分别为<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/5d74d8731e7744b989ad473db53f6e59.png" style="width: 20.8;height: 27.7;" width="20.8" height="27.7">,<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/6f29eb0fbd674268b61186cf4a64e5c6.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">,<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/2e786b73ad2f47f096695732fcd6ac1e.png" style="width: 20.8;height: 27.7;" width="20.8" height="27.7">……<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/d6ba442bdd4f404dae179cbd5fbd7520.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">,则<img src="https://api.yisouti.com/question/h_image/1/pandora/img/question/9b92e44c605a4b08aedae1a62ef2a93e.png" style="width: 22.5;height: 27.7;" width="22.5" height="27.7">可表示为（ ）。