Răspunsuri

2014-11-07T21:36:50+02:00
A) 1-1/2=1/2
1-1/3=2/3
1-1/4=3/4
dupa cum vezi suma devine
1/2 . 2/3 . 3/4...........2010/2011 . 2011/2012=
se fac simplificari si mai ramane
=1/2012
b) 3/2*4/3*5/4*     ...*2011/2010*2012/2011=
simplificand fractiile
=1/2*2012=2012/2=1006