exam Maths Puzzle Numerical Ability

How do you simplify 4In2 + 1/2 In4 - In8 to a single logarithm?

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exam Other Question

A rectangle has one side twice the length of the other. Express the area of the rectangle as a function of its perimeter A(P)? complex fractions

4 + 2 over x over x over 4+1 over 8