exam Maths Puzzle Numerical Ability

graph the exponential function f(x)=4^x-2

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exam Other Question

Please help to simplify

3i - 2i^2 + 3

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the square root of -16 - the square root of -2 times the square root of -2 A mason can build a wall iin 30 days. After working 24 days, he fell ill and his friend had to finish the wall. he worked for 5 days to finish the wall. How long would it take his friend to do the wall alone?