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Sagot :
Sure, let's find the combined function [tex]\((f+g)(x)\)[/tex] given the functions [tex]\(f(x) = 3 + 8x\)[/tex] and [tex]\(g(x) = 5x - 2\)[/tex].
We need to add these two functions together to find [tex]\((f+g)(x)\)[/tex].
Step by step:
1. Start by writing down the expressions for [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex]:
[tex]\[ f(x) = 3 + 8x \][/tex]
[tex]\[ g(x) = 5x - 2 \][/tex]
2. Now add [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex]:
[tex]\[ (f+g)(x) = f(x) + g(x) \][/tex]
Substitute the expressions of [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex] into the equation:
[tex]\[ (f+g)(x) = (3 + 8x) + (5x - 2) \][/tex]
3. Combine the like terms:
[tex]\[ (f+g)(x) = 3 + 8x + 5x - 2 \][/tex]
4. Combine the constants and the terms involving [tex]\(x\)[/tex]:
[tex]\[ (f+g)(x) = (3 - 2) + (8x + 5x) \][/tex]
Simplify the constants and the coefficients of [tex]\(x\)[/tex]:
[tex]\[ (f+g)(x) = 1 + 13x \][/tex]
Thus, the combined function:
[tex]\((f+g)(x) = 1 + 13x\)[/tex]
We need to add these two functions together to find [tex]\((f+g)(x)\)[/tex].
Step by step:
1. Start by writing down the expressions for [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex]:
[tex]\[ f(x) = 3 + 8x \][/tex]
[tex]\[ g(x) = 5x - 2 \][/tex]
2. Now add [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex]:
[tex]\[ (f+g)(x) = f(x) + g(x) \][/tex]
Substitute the expressions of [tex]\(f(x)\)[/tex] and [tex]\(g(x)\)[/tex] into the equation:
[tex]\[ (f+g)(x) = (3 + 8x) + (5x - 2) \][/tex]
3. Combine the like terms:
[tex]\[ (f+g)(x) = 3 + 8x + 5x - 2 \][/tex]
4. Combine the constants and the terms involving [tex]\(x\)[/tex]:
[tex]\[ (f+g)(x) = (3 - 2) + (8x + 5x) \][/tex]
Simplify the constants and the coefficients of [tex]\(x\)[/tex]:
[tex]\[ (f+g)(x) = 1 + 13x \][/tex]
Thus, the combined function:
[tex]\((f+g)(x) = 1 + 13x\)[/tex]
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