exam Maths Puzzle Numerical Ability

Please help me solve this problem:
x+1 divided by x-1 is greater than or equal to 0

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exam Other Question

Please help with the following question. Thank you

square root of x multiplied by the 4th root of x+4. I am to use Rational exponents to wrtie a single radical expression.

Thanks so much what is the number in the series
5,25,61,113,181
plss help fast
pls dont use algbra to explain
thanks