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Compute the total differential of f(x, y, z) = 3 + x4yz2.
Aging
The process of becoming older, characterized by gradual changes in physical, cognitive, and social abilities.
Middle Adulthood
A stage of life typically ranging from about 40 to 65 years of age, marked by continued personal and professional development, as well as a focus on family and community life.
Friendships
Relationships based on mutual trust, affection, and support between two or more people.
Close
To shut something or bring to an end; it can also refer to the physical proximity or the relationship closeness between individuals.
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