posted by Paris on .
Also with calculator, graph f(x), and determine all the possible maxima/minima coordinates to within two decimal points.
i did this and got my answers but i doubt they are right, can anyone get the answers if you have a TI-83-84 please? thank you.
Could you post your answers if you need a confirmation?
Also, calculate f'(x) and substitute the x-coordinate of the maximum/minimum to see if f'(x)=0. This will be another way to confirm your answer.
my answer is :
maxima: x= -1.56
Therefore x=-1.56(approx.) is a maximum or minimum.
Therefore x=-1.56 is a maximum.
f'(-1.29)=-2.03 ≠ 0
f'(-1.25)=-2.3605 ≠ 0
Therefore x=-1.29 and x=-1.25 are not maxima nor minima.
Check your graph without forgetting that the function is undefined at x=0.
oh thank you so much, so x=-1.56 is a maxima, and we don't have a minima?