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f(x) = 1/x ----> f '(x) = -1/x^2

**1**/**99**is approximately 1/100 so close to this the gradient of the tangent is -1...approx= 1/100 + 0.0001 = 0.0101 Edit. A calculator will of course confirm that**1**/**99**= 0.010101010101.......2 Answers · Science & Mathematics · 18/03/2011

...to pick from and we need to pick 6.... also with a lottery order of numbers

**does**not matter. 99!/(6!*(99-6)!) will give us our answer = 99*98*97*96*95...1 Answers · Science & Mathematics · 26/04/2013

...

**does**not have cancer, so 1% of 99.8% = 0.998% ≈ 1% 2. prob( not L) we**did**in**1**,**99**.8%. by the way, you lose a lot of accuracy if you round off your...1 Answers · Science & Mathematics · 14/01/2010

2+2=4

4 Answers · Science & Mathematics · 11/12/2011

What are you

**doing**with 49+49+1? It doesn't make sense to**do**that, let alone expecting it to equal 100. It should be 49 + 49 − 1 = 97. Anyway, if you don't have money, then don't buy the shirt.4 Answers · Science & Mathematics · 27/08/2012

Yes, they really

**do**equal the same thing. This question has already been answered...7 Answers · Science & Mathematics · 28/08/2009

**1**.**99**/55 = 9/5 or 1 4/5. 2. 13/91 = 1/7. 3. 42/7 = 6.3 Answers · Science & Mathematics · 22/01/2010

...!! So I suggest that 1/(1*2) + 1/(2*3) + ..... +

**1**/(**99***100) = 99/100 (See also Scott's formal proof above He...3 Answers · Science & Mathematics · 28/11/2006

the infinite series 9/10 + 9/100 + 9/1000 ..... = 0.999....

**does**equal 1. let S = 0.9999.......... then 10S = 9.99999.......... subtract the equations 9S = 9.00000........ S = 16 Answers · Science & Mathematics · 04/07/2009

... true. There are many ways of proving that

**1**=.**99**... This equation is simply an application of that. For another proof...4 Answers · Science & Mathematics · 18/06/2011