b,B=2^12.3^10+6^12 _________________ 2^11.3^10+6^10

1 bình luận về “b,B=2^12.3^10+6^12 _________________ 2^11.3^10+6^10”

1. # Ly :333

   B= (2^12 . 3^10 + 6^12)/(2^11 . 3^10 + 6^10)

   = (2^(10 +2) . 3^ 10 + 6^(10 +2))/(2^(10+1) . 3^10 + 6^10)

   = (2^10 . 2^2 . 3^10 + 6^10 .  6^2)/(2^10 . 2 . 3^10 + 6^10)

   = ((2^10 . 3^10). 2^2 + 6^10 . 6^2)/((2^10 . 3^10).2 + 6^10)

   = ((2.3)^10 . 2^2 + 6^10 . 6^2)/((2.3)^10 . 2 + 6^10)

   = (6^10 . 2^2 + 6^10 . 6^2)/(6^10 . 2 + 6^10)

   = (6^10 . (2^2 + 6^2))/(6^10 . (2+1))

   = (2^2 + 6^2)/(2+1)

   = (4 + 36)/3

   = (40)/3

    

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