exam Maths Puzzle Numerical Ability

Is 4 a solution to the equation x + 7 = 11?

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i need help whit all about this:


Solve this: (((3)^1/2)+ i)^500


please i donīt know how to solve this exercise, i need information about this and help, thank you for ch What is the answer for mn to the 2nd power over pm to the 5th power n?