exam Maths Puzzle Numerical Ability

Find each cube root or positive sqare root

squae root of a second power b tenth power c sixth power

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exam Other Question

Hello, this is a tricky one.Find the domain of this function
f(x) = SR of 1/2x-1
(square root)

Where do I start? Thank you, Paul How do i write the expression as single quotient in which only positive exponents and or radical appear?

(x^2+4)^.5(2x)-(x^2)(.5)(x^2+4)^-.5(2x)/(x^2+4)