If the quadratic equation MX ^ 2 + (2m-3) x + 4 = 0 has a positive root and a negative root, and the positive root is less than 1, the range of M is obtained

mx^2+(2m-3)x+4=0
Discriminant
△=(2m-3)²-16m>0
4m²-12m+9-16m>0
4m²-28m+9>0
4/m

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