book Maths Puzzle Numerical Ability

Can you give me two formulas for both arithmetic and geometric? I will need both the term and sum formula.

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book Other Question

Within the coordinate system, when a point is on either x- or y-axis (such as point 0,5), is it within a quadrant-- and if so, which one? If not, what do you call it?

Thanks. (x-7) (2)
__ = ___
(x-9) (x-9)