1)

Calulati

a)

2009 la puterea 2 - 2009 • 2010

b)

2009 la puterea 2 -2008 • 2009

c)

5+10+15+....+2005-5•(1+2+3+...+401)


2) calculati |x| + |y| stiind ca | x+y+2|+|x-y|=0

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Aflati numerele a si b,stiind ca:
a) (a,b)=48 si [a,b]=144
b) (a,b)=48 si a • b =6912
c) (a,b)=231 si [a,b]=693
Va rog mult de tot,e urgent!! Dau 59 de puncte cui raspunde corect. Multumesc anticipat!

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Dacă Mihai a împlint 8 ani, câți ani are mama lui?

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Stai langa oricare.
Sosisera altii.
L-am ascultat pe fiecare in parte.

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