Question

(4+8+12+...+2012):(2+4+6+...+1006)
a)1 b)2 c)3 d)0 <----(care e răspunsul corect)
(rezolvare cu suma gaus şi dau coroană

Answer 1

(4+8+12+....+2012):(2+4+6+....+1006)=
=4(1+2+3+....+503): 2(1+2+3+....+503)=
=(4*503*504:2):(2*503*504:2)=
=(2012*504:2):(503*504)=
=(1006*504):(503*504)=
=(1006:503):(504:504)=
=2:1=2

Answer 2

=4(1+2+3+...503):2(1+2+3+...503)

=4:2

=2

Raspuns corect b)