evelyn-jones_60c21b2990448
evelyn-jones_60c21b2990448
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1) S(50)= 50²/2+50/2 S(50)= 2500/2+50/2 S(50)= 2500+50/2 S(50)= 2550/2 S(50)= 1275 2) 703= n²/2+n/2 703= n²+n/2 2*703= n²+n 1406= n²+n n²+n-1406=0 (EQUAÇÃO DO 2º GRAU) Δ=b²-4ac Δ=1²-4*1*(-1406) Δ=1+5624 Δ= 5625 n= -b±√Δ/2a n= -1±√…