设A和B均为n×n矩阵,则必有( )。∣A+B∣=∣A∣+∣B∣AB=BA∣AB∣=∣BA∣(A+B)−1=A−1+B−1A∣A+B∣=∣A∣+∣B∣BAB=BAC∣AB∣=∣BA∣正确答案D(A+B)−1=A−1+B−1