Math question: Find the value of f(x) if x = 3 for the linear function f(x) = x.
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What is the result when vector A with magnitude 10 units is added to vector B with magnitude 8 units, and then subtracted by vector C with magnitude 15 units?
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Math question: According to the Fundamental Theorem of Calculus, if f(x) is continuous on [a, b], and F(x) is an antiderivative of f(x), what is the definite integral from a to b of f(x) dx?