Question

what is the domain of f(x)=square root of lnx

Answer 1

what is the domain of sqrt(u) ?

Answer 2

u >= 0

but u = lnx soo

when is lnx >= 0 ?

Answer 3

0 to positive infinity

Answer 4

lnx >=0 if we e^ both sides

e^(lnx) >= e^0

x >= 1

Answer 5

the domain of lnx is 0 to +inf yes but thats not really what we are looking for

Answer 6

we are looking for the domain of lnx that only outputs 0 or positive values

Answer 7

so neg infinity to 0..

Answer 8

wait thats not right sorry

Answer 9

consider the graph of lnx