exam Maths Puzzle Numerical Ability

I need some assistance on these word problems can anyone help thank you tine!

Use the arithmetic sequence of numbers 2, 4, 6, 8, 10� to find the following:
a) What is d, the d

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exam Other Question

1/(x-4) - 5/(x+2)=6/(x^2-2x-8) Can someone help me with this problem. I have to determine this is rational or irrational.

the negative symbol is alone to the left with the number 4 raised.
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-4√16
I believe this is irrational