- #1
sallyj92
- 5
- 0
Hey guys I need help how to solve this equation... Express your answer to the equation in the form alnb
9e^4x-e^2x=0
This is as far as I got
9e^4x=e^2x
ln(9e^4x)=ln(e^2x)
the answer given in the markscheme is x=1/2ln1/9, x=-1/2ln9, x=ln1/3, a=-1/2 and b=9, x=-ln3 (accept a=-1 and b=3)
I don't understand why there are so many options? and which ones are right?
9e^4x-e^2x=0
This is as far as I got
9e^4x=e^2x
ln(9e^4x)=ln(e^2x)
the answer given in the markscheme is x=1/2ln1/9, x=-1/2ln9, x=ln1/3, a=-1/2 and b=9, x=-ln3 (accept a=-1 and b=3)
I don't understand why there are so many options? and which ones are right?