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tomiko
Group Title
is my working correct? i need to find which number is bigger. i concluded that 2*sqrt38 is bigger of the two since 38^2 = 1444
 one year ago
 one year ago
tomiko Group Title
is my working correct? i need to find which number is bigger. i concluded that 2*sqrt38 is bigger of the two since 38^2 = 1444
 one year ago
 one year ago

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tomiko Group TitleBest ResponseYou've already chosen the best response.2
attched is my working
 one year ago

jasonxx Group TitleBest ResponseYou've already chosen the best response.1
seems correct
 one year ago

tomiko Group TitleBest ResponseYou've already chosen the best response.2
thanks a lot!
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
yes  correct again. BTW: you can make use of this fact:\[a^2\gt a^21\]\[\therefore a^2\gt (a+1)(a1)\]In this case a=38 so you know that:\[38^2\gt (38+1)(381)\]
 one year ago

tomiko Group TitleBest ResponseYou've already chosen the best response.2
how did you just decide a = 38? @asnaseer
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
in your last step you had:\[38^2?39\times37\]
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
so can conclude ? is ">" without actually evaluating \(38^2\)
 one year ago

tomiko Group TitleBest ResponseYou've already chosen the best response.2
but 38^2 is "a" but 39 x 37 is not = (a+1)(a1) so how can you compare that way?
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
no, a=38, remember the identity I showed was:\[a^2\gt (a+1)(a1)\]so, if a=38 we get:\[38^2\gt(38+1)(381)\]\[\therefore 38^2\gt39\times37\]
 one year ago

tomiko Group TitleBest ResponseYou've already chosen the best response.2
wow!! i see it now. where did you know this. i never came across this before?
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.1
nor did I  I just suddenly "spotted" the pattern  that is one of the beauty of maths, you never know what subtleties you will discover. :)
 one year ago
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