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Sagot :
To solve for the values [tex]\( x \)[/tex] that satisfy the equation [tex]\( f(x) = 7 \)[/tex], where the function is given by [tex]\( f(x) = 0.5|x - 4| - 3 \)[/tex], we'll follow these steps:
1. Set up the equation:
[tex]\[ 0.5 |x - 4| - 3 = 7 \][/tex]
2. Add 3 to both sides to isolate the absolute value expression:
[tex]\[ 0.5 |x - 4| = 10 \][/tex]
3. Multiply both sides by 2 to further isolate the absolute value expression:
[tex]\[ |x - 4| = 20 \][/tex]
4. The definition of the absolute value tells us that:
[tex]\[ x - 4 = 20 \quad \text{or} \quad x - 4 = -20 \][/tex]
5. Solve each of these linear equations separately:
[tex]\[ x - 4 = 20 \quad \Rightarrow \quad x = 24 \][/tex]
[tex]\[ x - 4 = -20 \quad \Rightarrow \quad x = -16 \][/tex]
Thus, the values of [tex]\( x \)[/tex] that satisfy [tex]\( f(x) = 7 \)[/tex] are [tex]\( x = 24 \)[/tex] and [tex]\( x = -16 \)[/tex]. Therefore, the correct answer is:
[tex]\[ \boxed{x = -16, x = 24} \][/tex]
1. Set up the equation:
[tex]\[ 0.5 |x - 4| - 3 = 7 \][/tex]
2. Add 3 to both sides to isolate the absolute value expression:
[tex]\[ 0.5 |x - 4| = 10 \][/tex]
3. Multiply both sides by 2 to further isolate the absolute value expression:
[tex]\[ |x - 4| = 20 \][/tex]
4. The definition of the absolute value tells us that:
[tex]\[ x - 4 = 20 \quad \text{or} \quad x - 4 = -20 \][/tex]
5. Solve each of these linear equations separately:
[tex]\[ x - 4 = 20 \quad \Rightarrow \quad x = 24 \][/tex]
[tex]\[ x - 4 = -20 \quad \Rightarrow \quad x = -16 \][/tex]
Thus, the values of [tex]\( x \)[/tex] that satisfy [tex]\( f(x) = 7 \)[/tex] are [tex]\( x = 24 \)[/tex] and [tex]\( x = -16 \)[/tex]. Therefore, the correct answer is:
[tex]\[ \boxed{x = -16, x = 24} \][/tex]
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