Question

for function f(X) = 3 + 4x-x² which of the following is true
a)f is maximum at X=2
b) f is minimum at X=2
c) f is maximum at X=-2
d) f is minimum at X=-2​

Answer 1

Answer:

a)

Step-by-step explanation:

df(x)/dx = 4-2x

for critical point 4-2x=0

x= 4/2

x=2

2>0

so f is Max at x=2