what is the result mean? i am a beginner,thank you for your kindness!

sorry, the correct matrix is --------------- ------------------------------- x_1 x_2 x_3 ... x_n 1 -1 0 ... 0 0 1 -1 ... 0 ... 0 0 0 ... ... 1 -1 -------------------------------- x_1,x_2... are constant number (or you can regard them as variables), I want the inverse of this matrix, of cause, the result contain the symbols of x_1,x_2...