exam Maths Puzzle Numerical Ability

how do you make x or any other letter in equation the subject?

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exam Other Question

i need to analyze the function f(x)=(x^3-1)/(x)

please i need to find out the first and second derivative, intervals in which f is decreasing, the growing and end behavior, and
The product of the smaller two of three consecutive integers is equal to 23 plus the largest. Find the integers.