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ln (x) = integral 1/t dt

from 1 to x

and x=30

Without a calculator and only a graph of y=1/x

How could you show that this geometric area under this curve (with any type of unit)

is equal to 3.4 area units, the ln (30)

not homework, I am looking for a tangible/physical example of above definition

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# Geometric area integration of 1/x

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