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I need help on question no. 2 Oct/Nov 2009 pure math 3

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osmosis:
can anyone help me how to find the two consecutive integers for question no.2 OCT/NOV 2009 pure math 3 paper??? ???

osmosis:
do we need to just substitute any integer??? or is there any other way to get x=3 and x=4???

astarmathsandphysics:
Will answer when I get up

astarmathsandphysics:
3^(x+2)=3^x+3^2
3^(x+2)-3^x=3^2
3^x(3^2-1)=3^2
3^x=3^2/(3^2-1)
xln3=ln(3^2/(3^2-1))
x=ln(3^2/(3^2-1)))/ln3

osmosis:
owh...that is for paper 31.... mine is paper 32....about finding the two consecutive integers on numerical solution topic.....that's where I got problem in finding the integer...can you help me with that one? :)

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