Q-4. For the following values of "f" read
the statements and answer carefully
a) If
f(x) = 5x2 + 40x+ 50
f(x) = 5x2 + 40x + 50
determine if the function is increasing
or decreasing at x=15. Also determine
for what values of x the function is
increasing, decreasing and neither.
b) If
f(x) = (x2 – 16)3
f(x) = (x2 - 16)3
then determine
all the critical points and their nature.
c) If
f(x) = 45x - 5lnx
f(x) = 45x – 5lnx
then determine
all the critical points and their nature.
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