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Exercise 2.8 · Q2

Q.Find all values of xx that satisfy the inequality 2x−3(x−2)(x−4)<0\dfrac{2x-3}{(x-2)(x-4)}<0.

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Step 1. Critical points: x=32x=\dfrac32 (numerator zero), x=2,4x=2,4 (denominator zero, excluded).

Step 2. Test each interval. x=0x=0: −3(−2)(−4)=−38<0\dfrac{-3}{(-2)(-4)}=\dfrac{-3}{8}<0. x=1.75x=1.75: 0.5(−0.25)(−2.25)>0\dfrac{0.5}{(-0.25)(-2.25)}>0. x=3x=3: 3(1)(−1)=−3<0\dfrac{3}{(1)(-1)}=-3<0. x=5x=5: 7(3)(1)>0\dfrac{7}{(3)(1)}>0. …

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