Question

domain of ln(x^2+2x-3)

Answer 1

spose we had ln(u) what is the domain ?

Answer 2

i have no idea

Answer 3

(-(infinity),infinity)?

Answer 4

um, ln(-4) is not defined for real numbers is it? so -4 at least is not in the domain of ln(u)

Answer 5

ln is only defined for inputs that are greater than 0

therefore the argument used has to be greater than 0

Answer 6

soo, we need to determine when

x^2+2x-3 > 0

Answer 7

x>1 x>-3

Answer 8

one of your signs is backwards i think

Answer 9

(-3,infinity)

Answer 10

x < -3 or 1 < x

Answer 11

(-inf,-3) u (1,inf)

Answer 12

k

Answer 13

thanks