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a,63:62+94=6+94=100
b,135-54:52=135-52=135-25=110
c,73:7-45:43=72-42=49-16=33
d,87:84:82+8=8+8=16.
\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=135-25=110\\ c,7^3:7-4^5:4^3=7^2-4^2=49-16=33\\ d,8^7:8^4:8^2+8=8^2+8=64+8=72\)
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c) 73 : 7 - 45 : 43
= 72 - 42
= 49 - 16
= 33
d) 87 : 84 : 82 + 8
= 8 + 8
= 16
a) 63 : 62 + 94
= 6 + 94
= 100
b) 135 - 54 : 52
= 135 - 52
= 135 - 25
= 110
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\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=110\\ c,7^3:7-4^5:4^3=7^2-4^2=33\\ d,8^7:8^4:8^2+8=8+8=16\)
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\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=135-25=110\\ c,7^3:7-4^5:4^3=7^2-4^2=49-16=33\\ d,8^7:8^4:8^2+8=8+8=16\)
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\(2.3^2-4^3:\left(-16.2\right)\)
\(=2.9-64:\left(-32\right)\)
\(=18-\left(-2\right)=18+2=20\)
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( 3x - 17 ) . 16 = \(4^3\)<=> ( 3x - 17 ) . 16 = 64
<=> 3x - 17 = 64 : 16
<=> 3x = 4 + 17
<=> x = 21 : 3
<=> x = 7
(3X-17).16=43
(3X-17).16=64
(3X-17)=64:16
3X-17=4
3X=4+17
3X=21
X=21:3
X=7
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43 - ( 5 - 2 )2 + 150
= 64 - 32 + 1
= 64 - 9 + 1
= 55 + 1
= 56
k đúng cho mình nha !
-Học tốt-
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Ta có :
4 mũ 3=4.4.4=64;8 mũ 2=8.8=64
Bởi vì 64=64 nên suy ra 4 mũ 3= 8 mũ 2