Let m > N, n ∈ n *, x > 1, a = (lgx) m + (lgx) - m, B = (lgx) n + (lgx) - N, then the relation between a and B is () A. A ≥ BB. A ≤ BC. It is related to the value of X, the size is uncertain. D. all the above are incorrect

Let m > N, n ∈ n *, x > 1, a = (lgx) m + (lgx) - m, B = (lgx) n + (lgx) - N, then the relation between a and B is () A. A ≥ BB. A ≤ BC. It is related to the value of X, the size is uncertain. D. all the above are incorrect

As a result of the (lgx) m (lgx) and (lgx) m (lgx) and (lgx) n (lgx) n (lgx) n (lgx) n (lgx) m (lgx) and (lgx) n (lgx) n (lgx) and (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) - n (lgx) - n (lgx) - n (lgx) - n (lgx) - n (lgx) - n (lgx) and (lgx) as (lgx) n (lgx) and (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n (lgx) and (lgx) n (lgx) n (lgx) n (lgx) n (lgx) n) n (lgx) (lgx) m - (lgx) n] · (lgx) M +N − 1 (lgx) m + n = 0, then a = B, if x > 10, then (lgx) m + n > 1, then A-B = [(lgx) m - (lgx) n] · (lgx) m + n − 1 (lgx) m + n > 0, then a > b, if 0 < x < 10, then (lgx) m + n < 1, then A-B = [(lgx) m - (lgx) n] · (lgx) m + n − 1 (lgx) m + n < 0, then a < B, that is, the size relationship between a and B is related to the value of X, the size is uncertain, so select: C