Question 415237
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y\,\cdot\,y^8\,\cdot\,y^5\ =]


You need the product rule, a definition, and a property:


You need the definition: *[tex \Large a^1\ =\ a\,\forall\ a\ \in\ \mathbb{R}]


You need the associative property to tell you that it doesn't matter which pair of factors to which you apply the product rule first.


You need the product rule:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ a^m\ \cdot\ a^n\ =\ a^{m\,+\,n}]


Then all you need is to add


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 1\ +\ 8\ +\ 5]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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