ray-robertson_60ae0790979b5
ray-robertson_60ae0790979b5
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a8=a4+ 4r 20=10+ 4r 20-10=4r 4r=10 r=10/4 a4=a1+3r 10= a1+ 3X10/4 10= a1+ 30/4 10-30/4=a1 a1=10/4 r=a1 Resposta correta letra a Espero ter ajudado.