Question

(4 + 8 + 12 + 16 + ... + 100) : ( 2+4+6+ ...+50) va rog

Answer 1

( 4 + 8 + 12 + 16 + ...... + 100 ) : ( 2 + 4 + 6 + ...... + 50 ) = 2

= 4 × ( 1 + 2 + 3 + 4 + ..... + 25 ) : 2 × ( 1 + 2 + 3 + ...... + 25 ) =

= 4 : 2 =

= 2

Answer 2

(4 + 8 + 12 + 16 + ... + 100) : ( 2+4+6+ ...+50) =

dam factor comun la prima paranteza pe 4

iar la cea de-a doua paranteza pe 2

4 × (1 + 2 + 3 + 4 +...+ 25) :[2 ×(1 +2 + 3 +...+ 25)]=

4 : 2 × (1+2+3+4 +...+25) : (1+2+3+4+...+25) =

2 × 1 =

2
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