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Aflati suna lui gaus: (6+12+18+.........+96):( 2+4+6+8)

Răspuns :

(6+12+18+......+96):(2+4+6+8)

(96-6):6+1=16
S1=16×102:2=816
S2=20
816:20=40.8
aflam nr. de termeni     (96-6):6+1=16
S₁=16*102:2=816
S₂=20
816/20=40.8