Ok, how can I enter this into a TI-83+ to verify what I did on paper? I am supposed to solve for X without a calc. and then verify it with a calc....

log(3) (x-1) =2

Question

Ok, how can I enter this into a TI-83+ to verify what I did on paper?  I am supposed to solve for X without a calc. and then verify it with a calc....

log(3) (x-1) =2

anonymous · Answer

anyone?

anonymous · Answer

log base 3 of x-1?

anonymous · Answer

I would enter in the y =
y =2 
and log(x-1)/log(3)
then use the intersect for both equations

anonymous · Answer

or you could enter that same expression and use the table feature to find where it equals 2

anonymous · Answer

so that would be two separate lines in the Y= screen?

anonymous · Answer

yes

anonymous · Answer

is that what you are trying to do?  verify using a "graphing" calculator

zarkon · Answer

are you trying to find the solution with your ti83?

anonymous · Answer

ok, now if I were to re-write that as a "normal" number, it would be 3^2=(x-1) right?

anonymous · Answer

that is correct

anonymous · Answer

anyone?

anonymous · Answer

yeah, the instructions say to solve it without a calculator and then verify with a calulator to make sure you did it right

anonymous · Answer

I came up with X=10 on paper... would you agree?

anonymous · Answer

that is correct

anonymous · Answer

sweet, ok so here is a twist on that question, how would I write 3^2=x-1 in my calculator?

zarkon · Answer

what is $$\frac{\log(10-1)}{\log(3)}$$

anonymous · Answer

2

zarkon · Answer

you just verified your solution

anonymous · Answer

killer, you are the man!