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Input value of a linear function

High school · ●●○○○ 20 pts

Given that f(x2−1)=2x+3f\left(\frac{x}{2} - 1\right) = 2x + 3 for all xx, and f(m)=6f(m) = 6, find the value of mm. Give your answer as a decimal.

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linear functionslinear equations