Question: The graph of a logarithmic function f(x) passes through the points (1, 2) and (10, 4). Determine its logarithmic form and graph f(x) for x ∈ [1, 10].
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How many liters are in 3.5 gallons?
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What is the value of f(x) if f(x)=c, where c is a constant, for all x?