If point P (2m + 1, 3M − 12) is in the fourth quadrant, then the value range of M is______ ．

∵ point P (2m + 1, 3M − 12) is in the fourth quadrant, ∵ 2m + 1 ＞ 03m − 12 ＜ 0, the solution is: - 12 ＜ m ＜ 13

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