(3/7)21.(9/49)6
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(3/7)^21:(9/49)/6
Lời giải:
\((\frac{3}{7})^{21}:(\frac{9}{49})^6=(\frac{3}{7})^{21}:[(\frac{3}{7})^2]^{6}=(\frac{3}{7})^{21}:(\frac{3}{7})^{12}\\
=(\frac{3}{7})^{21-12}=(\frac{3}{7})^9\)
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( 3/7 )^21 : ( 9/49 )^6
(3/7)^21 : (9/49)^6 = (3/7)^21 : (3/7 *3/7)^6= (3/7)^21 : (3/7)^12 = 3/7^9
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4×7/9×23
2×21/14×15
2×5×13/26×35
9×6-9×3/18
17×5-17/3-20
49+7×49/49
Tính: (3/7)^21:(9/49)^6
(3/7)^21:(9/49)^6
=(3/7)^21:[(3/7)^2]^6
=(3/7)^21:(3/7)^12
=(3/7)^9
Tính (3/7)^21 : (9/49)^6
(3/7)^21:[(3/7)^2]^6
(3/7)^21:[(3/7)^12
(3/7)21-12
(3/7)^9
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(3/7)21: (9/49)6
= (3/7)21: (32/72)6
= (3/7)21: (3/7)12
= (3/7)21-12
= (3/7)9
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=(3/7)^9 lol
2×3×5+4×9×25+6×9×35+10×21×40
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2×3×7+4×9×35+6×9×49+10×21×56
tinh : (3/7)21;(9/49)6
Tính:
a.(3/7)^21 : (9/49)^6
b. 3+(6/7)^0+(1/2)^2: 2
Tính (3/7)21:(9/49)6