已知矩阵<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23819543_0.png">与<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23819543_0_1.png">相似，则λ等于（　　）。