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Re: Some help with problems
Posted:
Jun 14, 2013 11:23 PM


the fifth problem is wrong because (3/2) < ( (2^571 +3) / (3^247 + 2)) rather than">" It is same as: 2^572>3^248 2^143>3^62 there are two ways for you the first: 143 ln2>62 ln3 so we want to prove (ln2)/(ln3)>62/143 as is known to all ln2>0.7 ln3<1.1 then (ln2)/(ln3)>0.64 0.64>0.5>62/143 the second way: 3^62<2^143=2*4^71 3^62<4^71 so It is correct the seventh problem: I am so sorry that I cannot understand your meaning. rhombus is also a kind of parallelogram.



