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Show that the curves y = 2^(x) and y = 5...

Show that the curves `y = 2^(x) and y = 5^(x)` intersect at an angle `tan^(-1) |("1n ((5)/(2)))/(1 + 1n 2 1n 5)|`.
Note Angle between two curves is the angle between their tangents at the point of intersection.

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