book Maths Puzzle Numerical Ability

Find two positive real numbers that differ by 1 and have a product of 1.

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book Other Question

Evaluate:

(log of 2)4 square root 2 Okay this is a function of a right triangle where side a is equal to 16 and its corresponding angle is 45 degrees side b and the hypoteneous are unknown. Is there a way to solve for the two missing sides?