Toán Lớp 7: 3^18.24^4/18^4.9^5
28^6.7^6/2^7.98^7
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Toán Lớp 7: 3^18.24^4/18^4.9^5
28^6.7^6/2^7.98^7
Comments ( 2 )
(3^18 . 24^4)/(18^4 . 9^5)
=(3^18 . (2^3 . 3)^4)/((2.3^2)^4 . (3^2)^5)
=(3^18 . (2^3)^4 . 3^4)/(2^4 . (3^2)^4 . (3^2)^5)
=(3^18 . 2^12 . 3^4)/(2^4 . 3^8 . 3^10)
=(3^22 . 2^12)/(2^4 . 3^18)
=(3^4 . 2^8)/(1.1)
=3^4 . 2^(2.4)
=3^4 . (2^2)^4
=3^4 . 4^4
=(3.4)^4
=12^4
b)
(28^6 . 7^6)/(2^7 . 98^7)
=((28.7)^6)/((2.98)^7)
=(196^6)/(196^7)
=1/196