Mister Exam
11*log(x^2+x-20)<=12+log((x+5)^11/(x-4)) inequation
The solution
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/ 11\
/ 2 \ |(x + 5) |
11*log\x + x - 20/ <= 12 + log|---------|
\ x - 4 /
$$11 \log{\left(\left(x^{2} + x\right) - 20 \right)} \leq \log{\left(\frac{\left(x + 5\right)^{11}}{x - 4} \right)} + 12$$
11*log(x^2 + x - 20) <= log((x + 5)^11/(x - 4)) + 12
Rapid solution
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Or(And(x <= 4 + E, 4 < x), x = 4 - E)
$$\left(x \leq e + 4 \wedge 4 < x\right) \vee x = 4 - e$$
(x = 4 - E))∨((4 < x)∧(x <= 4 + E)
Rapid solution 2
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{4 - E} U (4, 4 + E]
$$x\ in\ \left\{4 - e\right\} \cup \left(4, e + 4\right]$$
x in Union(FiniteSet(4 - E), Interval.Lopen(4, E + 4))