exam Maths Puzzle Numerical Ability

Consider the following function
f(x) = 2 sin(x/4 - p)


What is the amplitude of this function?
What is the exact period of f(x) (in radians)?

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exam Other Question

If you don't mind could you please help me solve the equation square root of x-2 equals to 6 square root x^3-26.

Thanks alot
Use the rational roots theorem to solve:
p(x)=x^4-5x^3+5x^2+5x-6