Question

Which logarithmic equation has no solutions?
a. ln(x)=1
b. ln(x+2)=ln(7-4x)
c. ln(x-2)=1
d. ln(x-2)=ln(4x+7)

Answer 1

D, solve for x and try to put in log

Answer 2

log (-ive no.)= not defined

Answer 3

To undo a natural log (ln) just raise both sides to a power of e.

ln(x)=1

e^(lnx)=e^1

x=e