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Determine where the function is concave upward.
Grandparents
The parents of one's parents, often playing a role in family support and upbringing of grandchildren.
Raise
An increase, usually referring to an increase in salary or wage.
Affectionate Ties
Emotional and deep connections between individuals characterized by feelings of love, care, and emotional bond.
Sexually Active
Refers to individuals who engage in sexual activities and behaviors.
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