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Question
Answer the following:
Find the range of the following function.
f(x) = 1 + 2x + 4x
Solution
f(x) = 1 + 2x + 4x
Since, 2x > 0, 4x > 0
∴ f(x) > 1
∴ The range of function f = `(1, ∞)`
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