Solve the equation 3^(x+2) = 3^(x) + 3^(2), giving your answer correct to 3 significant figures.

Question

yamyam70 · Answer

@petiteme  :)

anonymous · Answer

What do you know of the properties of exponents? For instance this relation will probably help you get started:$$a ^{(n+m)}=a ^{n}*a ^{m}$$
Let me know if you need further help!

anonymous · Answer

I am A2 student this question is from the cambrridge A level past papers Nov 2009 question 2 . this is the link of the answer but im not understanding how to solve and how to reach to the answer. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w09_ms_31.pdf

anonymous · Answer

Start by expanding 3^(x+2) then try to solve for 3^x.

anonymous · Answer

ok I got it now Thanks for your help

anonymous · Answer

No problem good luck!