Math  /  Algebra

Questionand 12 , for the given functions ff and gg, find the following: (c) (fg)(x)(f \cdot g)(x) (d) (fg)(x)\left(\frac{f}{g}\right)(x) (b) (fg)(x)(f-g)(x) (g) (fg)(2)(f \cdot g)(2) (h) (fg)(1)\left(\frac{f}{g}\right)(1) (f) (fg)(4)(f-g)(4)
12. f(x)=2x+33x2;g(x)=4x3x2f(x)=\frac{2 x+3}{3 x-2} ; g(x)=\frac{4 x}{3 x-2}

Studdy Solution
Evaluate (fg)(4)(f - g)(4) by substituting x=4x = 4 into (fg)(x)(f - g)(x).
(fg)(4)=2(4)+33(4)2=8+3122=510=12(f - g)(4) = \frac{-2(4)+3}{3(4)-2} = \frac{-8+3}{12-2} = \frac{-5}{10} = -\frac{1}{2}
Solution Summary:
1. (fg)(x)=8x2+12x(3x2)2(f \cdot g)(x) = \frac{8x^2 + 12x}{(3x-2)^2}
2. (fg)(x)=2x+34x\left(\frac{f}{g}\right)(x) = \frac{2x+3}{4x}
3. (fg)(x)=2x+33x2(f - g)(x) = \frac{-2x+3}{3x-2}
4. (fg)(2)=72(f \cdot g)(2) = \frac{7}{2}
5. (fg)(1)=54\left(\frac{f}{g}\right)(1) = \frac{5}{4}
6. (fg)(4)=12(f - g)(4) = -\frac{1}{2}

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