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right-to-left binary method

Show that computing x15 by either the right-to-left binary method or the left-to-right binary method requires six multiplications, and demonstrate that it can be done using only five multiplications.

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According to right-to-left binary method, we know that the binary presentation of 15 is 1111,
then we have the following ...

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This job models the right-to-left binary method.

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