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algebraic formula for doubling numbers. For example to type the function 2x3 -2x2 10 type the following into cell B1. It is simply the number of dots in each triangular pattern.
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Xn means term number n so term 3 is written x3. Well doubling your penny could be expressed as 2d where d equals the amount of days you have been doubling. They are Squares 1 2 1 2 2 4 3 2 9 4 2 16 Rule.
Very roughly 10 doublings gives you a thousand 3 digits.
A n 2 ⁿ for n 0123etc. If n 0123. For example the behaviour of the height of a ball when it is thrown. Writing an algebraic expression.
