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arătați că (3/1-3/1×1/5×1/3)×5/14=1​

Răspuns :

(3/1-3/1×1/5×1/3)×5/14=

=(3/1-3/5×1/3)×5/14=

=(3/1-1/5)×5/14=

=(15/5-1/5)×5/14=

=14/5×5/14=1

(3/1-3/5x1/3)x5/14
(3/1-1/5)x5/14
(15/5-1/5)x5/14
14/5x5/14=1