Log to index How does logarithm turn into exponent.. what formula is it '? For example, this problem log (x) (27) = 3 / 2 (x is the base number, 27 is the real number) to find X I want to know the formula

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• 20. Proof: F (x) is monotonically increasing, if there is {xn} - > + ∞, such that limf (xn) = a (n - > ∞), then limf (x) = a (x - > ∞) It is proved that let limf (xn) = a For any E > 0, there exists N1 such that | f (xN1) - a | + ∞, there exists a natural number n. when n > N, there is xn > xN1 Then | f (xn) - f (xN1) | ≤ | f (xN1) - A| The last step is to use Heine's theorem