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5.3 Interpretation of the Sign of Derivative
We will now cover the meaning
of the sign of the derivative and see what inference can be drawn
from it and also study its applications to some practical problems
from onwards. We will assume that the functions that we consider
are continuous and differentiable at all points and all intervals
in questions unless otherwise stated. Further the numbers, denoted
by h or D,
will always be taken as positive.
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