Using <span>Descartes' rule of signs.
There are 4 changes of signs of coefficients:
+ to - (+x^6-x^5)
- to + (-x^4+4x^3)
+ to - (+4x^3-12x^2)
- to + (-12x^2+12)
Therefore, there are 4,2 or 0 positive roots </span><span><span>at most</span>. So it must be the third answer.
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The sequence is not arithmetic
Answer: 55.56%
why: 5/9= .5556 .5556 x 100= 55.56
The answer is: m=f/a. use reverse operations so that m is now the subject
