junanno Posted August 29, 2005 Share Posted August 29, 2005 If 3^6x = 8100, what is the value of (3^(x-1))^3? a.) 90 b.) 30 c.)10 D.) 10/3 E.) 10/9 OA: E Quote Link to comment Share on other sites More sharing options...
tictaktoe Posted August 29, 2005 Share Posted August 29, 2005 3 ^ 6x = (3^3x)^2 = (90)^2 so 3^3x = 90 Now (3^(x-1))^3 = 3^(3x-3) = 3^3x/3^3 = 90 / 3*3*3 = 10/3 Dnt u think OA sud b D? Am i missing something? Quote Link to comment Share on other sites More sharing options...
ESeraph Posted August 29, 2005 Share Posted August 29, 2005 I think itz D Quote Link to comment Share on other sites More sharing options...
Boddy Posted August 29, 2005 Share Posted August 29, 2005 agree with tictaktoe Quote Link to comment Share on other sites More sharing options...
junanno Posted August 29, 2005 Author Share Posted August 29, 2005 Thanks for clarifying. The OA is most likely wrong. Quote Link to comment Share on other sites More sharing options...
Dimas Posted August 29, 2005 Share Posted August 29, 2005 D for sure. Quote Link to comment Share on other sites More sharing options...
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