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For the calculation of napierian logarithm of a number, just enter the number and apply the function ln. Thus, for calculating napierian logarithm of the number 1, you must enter ln (`1`) or …

Solution: Since 4/x is the base of a log function x is greater than 0. The solution is x = 1, 4.

So we can think of ln(x) as a sort of analogue of this function. OK. So now let's remember the 2nd fundamental theorem of calculus:

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