Question

rezultatul calculului 1/1×2+1/2×3+1/3×4 este:
A.3/4
B.15/12
C.7/6
D.8/28
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Answer 1

1 / 1 × 2 + 1 / 2 × 3 + 1 / 3 × 4 = 2 / 1 + 3 / 2 + 4 / 3 = 12 / 6 + 9 / 6 + 8 / 6 = 21 / 6 + 8 / 6 = 29 / 6

Answer 2

1/1 × 2 + 1/2 × 3 + 1/3 × 4 =

2/1 + 3/2 + 4/3 =

2 + 3/2 + 4/3 = ( 12 + 9 + 8 )/6 = 29/6