Differential calculus grew from the problem of defining:
ATangent lines
BBounded areas
CPrime numbers
DComplex roots
Answer & Solution
Correct answer: A. Tangent lines
1. The two halves of calculus answer two different questions.
2. One asks how steep a graph is at a point.
3. That is the problem of defining tangent lines and their slopes.
_Source: NCERT Class 12 Mathematics Part II, Chapter 7, Integrals._
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