Question

what do you get as the root of this

-(4e^x(e^x - 4))/(e^x + 4)^3= 0

Answer 1

i think just set \(e^x-4=0\) and solve, because \(4e^x\) is never zero

Answer 2

so answer would be \(x=\ln(4)\)

Answer 3

hmm im trying to find where that function is concave up and down

Answer 4

what would be the interval notation for the root

(-inf, ln(4)?

Answer 5

the root is not an inteval, it is a number

Answer 6

i know. but i have to put the root in interval notation...then pick a number that lies on that notation to test if its increasing