exam Maths Puzzle Numerical Ability

How do you solve x to the fourth-1?

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exam Other Question

Perform the indicated operations; write answer in simplest form; note: "•" denotes multiplication:
4 and 2/3 • 3 and 1/3 • 3 and 3/4
Can you help me with this problem.

Find the solution sets for

(sqrt2x+1) - (sqrt x) = 1