exam Maths Puzzle Numerical Ability

Graph the function:
f(x)= -/x-1/ +2
** /= absoulute value

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exam Other Question

Solve the inequality & write the solution set in interval notation:

2 < 4 + 2/5x < 8 I have no idea how to solve this problem:

If y is inversely proportional to the square of x, and y=1 when x=4, find y when x=8.