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Q. 57
Expert-verifiedFor each set of sign charts in Exercises 53–62, sketch a possible graph of f.
The possible graph of f is
The given sign chart is
To sketch the possible graph of f, we will use theorem 3.6 and 3.10.
Theorem 3.6 states that the Derivative Measures Where a Function is Increasing or Decreasing, let f be a function that is differentiable on an interval I.
(a) If is positive in the interior of I, then f is increasing on I.
(b) If is negative in the interior of I, then f is decreasing on I.
(c) If is zero in the interior of I, then f is constant on I.
Theorem 3.10 states that the Second Derivative Determines Concavity, suppose both f and are differentiable on an interval I.
(a) If is positive on I, then f is concave up on I.
(b) If is negative on I, then f is concave down on I.
From the given chart, we conclude that
is positive on the intervals and negative on the intervals Thus, f will we increase on the positve intervals and decrease on the negative intervals.
is positive on the interval and negative on the interval Thus, f will be concave up on the positive intervals and concave down on the negative intervals.
The graph is
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