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Sagot :
To find the value of [tex]\( f(7) \)[/tex] where the function [tex]\( f(x) = \frac{3}{x + 2} - \sqrt{x - 3} \)[/tex], follow these steps:
1. Evaluate the first part of the function: [tex]\( \frac{3}{x + 2} \)[/tex]
Substitute [tex]\( x = 7 \)[/tex] into the expression:
[tex]\[ \frac{3}{7 + 2} = \frac{3}{9} = \frac{1}{3} \][/tex]
2. Evaluate the second part of the function: [tex]\( \sqrt{x - 3} \)[/tex]
Substitute [tex]\( x = 7 \)[/tex] into the expression:
[tex]\[ \sqrt{7 - 3} = \sqrt{4} = 2 \][/tex]
3. Combine the results:
[tex]\[ f(7) = \frac{1}{3} - 2 \][/tex]
4. Simplify the result:
[tex]\[ f(7) = \frac{1}{3} - 2 = \frac{1}{3} - \frac{6}{3} = \frac{1 - 6}{3} = \frac{-5}{3} = -1.6666666666666667 \][/tex]
5. Round the result to the nearest hundredth:
[tex]\[ f(7) \approx -1.67 \][/tex]
So, the completed statement is:
[tex]\[ f(7) = -1.67 \][/tex]
1. Evaluate the first part of the function: [tex]\( \frac{3}{x + 2} \)[/tex]
Substitute [tex]\( x = 7 \)[/tex] into the expression:
[tex]\[ \frac{3}{7 + 2} = \frac{3}{9} = \frac{1}{3} \][/tex]
2. Evaluate the second part of the function: [tex]\( \sqrt{x - 3} \)[/tex]
Substitute [tex]\( x = 7 \)[/tex] into the expression:
[tex]\[ \sqrt{7 - 3} = \sqrt{4} = 2 \][/tex]
3. Combine the results:
[tex]\[ f(7) = \frac{1}{3} - 2 \][/tex]
4. Simplify the result:
[tex]\[ f(7) = \frac{1}{3} - 2 = \frac{1}{3} - \frac{6}{3} = \frac{1 - 6}{3} = \frac{-5}{3} = -1.6666666666666667 \][/tex]
5. Round the result to the nearest hundredth:
[tex]\[ f(7) \approx -1.67 \][/tex]
So, the completed statement is:
[tex]\[ f(7) = -1.67 \][/tex]
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