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(3la


puterea
4+3laputerea5+3laputerea7):(2laputerea5-2laputerea4-2laputerea3


Răspuns :

(3⁴+3⁵+3⁷):(2⁵-2⁴-2³)=
=3⁴(1+3+3³) :2³(2²-2-1)=
=3⁴×31 :2³=
=81×31:8=313,875