Toán Lớp 6: f) (20.2 mũ 4 +12.2 mũ 4 −48.2 mũ 2 ):8 mũ 2 .
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Toán Lớp 6: f) (20.2 mũ 4 +12.2 mũ 4 −48.2 mũ 2 ):8 mũ 2 .
Comments ( 2 )
f)(20.2^4+12.2^4-48.2^2):8^2
=(20.2^4+12.2^4-24.2^4):8^2
=2^4(20+12-12):64
=16.20:64
=320:64
=5
Giải đáp:
(20 . 2^4 + 12. 2^4 – 48 . 2^2) : 8^2
=(20.2^4+12.2^4−12.2^4):2^6
=[2^4.(20+12−12)]:2^6
=[2^4 .20]:2^6
=[2^6 .5]:2^6
= 5
$#dariana$