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 1d awarded Notable Question Nov 23 awarded Notable Question Aug 13 awarded Yearling May 19 awarded Famous Question Apr 18 awarded Popular Question Jan 27 awarded Favorite Question Dec 24 awarded Nice Question Nov 1 awarded Popular Question Aug 13 awarded Yearling Jul 2 awarded Curious Mar 30 awarded Famous Question Feb 4 comment Prove that $[\log(2x-3) / \log x] + [\log_x(x+6) / \log_{x+2} x] = 1$ It is not about substituting for x, it is about trying to find that value of x which when substituted for x would satisfy this inequality. Just about any value wouldn't satisfy this inequality Feb 4 comment How to know difference between sum of numbers? Basically I have done the same. I just wanted to make it sound simple. else the units difference would have been 30 and the tens 330, just where am adding the units 3 difference in 60-69 changes, nothing else. But yes you are right Feb 4 answered How to know difference between sum of numbers? Dec 10 revised Chebychev's formula with upper bound tex syntax Dec 10 suggested approved edit on Chebychev's formula with upper bound Oct 29 awarded Nice Question Oct 13 comment Limit: $\lim_{x\to\infty} \sqrt{x+\sqrt{x}}-\sqrt{x}$ Try L'Hospital's rule Oct 3 awarded Popular Question Sep 25 awarded Notable Question