- #1
roy5995
- 29
- 0
What happens if you are trying a first and second derivative test on a function and they do not exist on the function (they only give errors)
Also, is it possible that the critical values of a function (max, mins, points of inflection) don't extist on a function
example
y=-4x(x^2 -6)^0.5
y'=-8(x^2 -6)^-0.5 (x^2 -3)
y''=8x(x^2-6)^-1.5 (x^2 -9)
When finding the max and mins set y'=0
and i find that the max and mins are at -root3 and root3 (i can't type a square root sign)
but they don't exist in the function ( when i susbstitute that into the function i get error because you can't squaer root a negative number.
What do i do?
Also, is it possible that the critical values of a function (max, mins, points of inflection) don't extist on a function
example
y=-4x(x^2 -6)^0.5
y'=-8(x^2 -6)^-0.5 (x^2 -3)
y''=8x(x^2-6)^-1.5 (x^2 -9)
When finding the max and mins set y'=0
and i find that the max and mins are at -root3 and root3 (i can't type a square root sign)
but they don't exist in the function ( when i susbstitute that into the function i get error because you can't squaer root a negative number.
What do i do?