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If f(x) = 5x4 - 11x3 + 18 , find the intervals where f is concave up and where f is concave down.
Philosophy
The study of fundamental questions about existence, knowledge, values, reason, mind, and language through a critical, systematic approach.
Cocaethylene
A toxic chemical formed when cocaine and alcohol are consumed together, exacerbating the effects and risks associated with each substance alone.
Depressant
A substance that reduces neural activity and slows body functions, often used to treat anxiety or sleep disorders.
Tranquilizer
A type of medication designed to reduce tension and anxiety without inducing sleep.
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