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wu :: forums    riddles    easy (Moderators: william wu, towr, Grimbal, SMQ, ThudnBlunder, Icarus, Eigenray)    3^x « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: 3^x  (Read 302 times) codpro880 Junior Member Teachers strike, students hurt. English...     Gender: Posts: 89 3^x   « on: Feb 25th, 2009, 5:17pm » Quote Modify Find the value of x without using a calculator/logarithms:   3^x-3^(x-1)=162 IP Logged You miss 100% of the shots you never take. howard roark Full Member     Posts: 241 Re: 3^x   « Reply #1 on: Feb 25th, 2009, 5:41pm » Quote Modify 5? IP Logged codpro880 Junior Member Teachers strike, students hurt. English...     Gender: Posts: 89 Re: 3^x   « Reply #2 on: Feb 25th, 2009, 6:15pm » Quote Modify Yes, but show the algebra IP Logged You miss 100% of the shots you never take. howard roark Full Member     Posts: 241 Re: 3^x   « Reply #3 on: Feb 25th, 2009, 7:46pm » Quote Modify 3^x-3^x/3=162   (2/3)3^x=162   3^x=243   x=5 IP Logged rmsgrey Uberpuzzler     Gender: Posts: 2874 Re: 3^x   « Reply #4 on: Feb 26th, 2009, 9:34am » Quote Modify 162=200003 =1000003-100003 =103x-103x-1   x=5 « Last Edit: Feb 26th, 2009, 9:35am by rmsgrey » IP Logged Pages: 1  Reply Notify of replies Send Topic Print Forum Jump: ----------------------------- riddles -----------------------------=> easy   - medium   - hard   - what am i   - what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »

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