Recent content by ifi2world

the sign is + for x<0 & - for x>0...so next is i need to find the domain for the function for the interval value...right?

yes.. sorry for typo error. so what should i do next to get the interval? i need to find x after i did the 1st derivative but how to square root the -11? isn't that impossible or does it have another formula?

Homework Statement find the intervals of increase or decrease of the function f(x)= (3/(x^2+11)-1 i already find the 1st derivative f'(x)= -6x/ (x^2 +11). After that i didnt know how to proceed to find the interval. I need help for the solutions.