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Bạn viết lại đề được không!? Nếu đề có số âm thì bạn cần có thêm dấu ngoặc vào nhé!
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Giải
a) (−8).(−3)3.(+125)(−8).(−3)3.(+125)
= [(−2).(−2).(−2)].[(−3).(−3).(−3)].(5.5.5)[(−2).(−2).(−2)].[(−3).(−3).(−3)].(5.5.5)
= [(−2).(−3).5].[(−2).(−3).5].[(−2).(−3).5][(−2).(−3).5].[(−2).(−3).5].[(−2).(−3).5]
= 30.30.30=30330.30.30=303
b) 27.(−2)3.(−7).(+49)27.(−2)3.(−7).(+49)
= (3.3.3).[(−2).(−2).(−2)].[(−7).(−7).(−7)](3.3.3).[(−2).(−2).(−2)].[(−7).(−7).(−7)]
= [3.(−2).(−7)].[3.(−2).(−7)].[3.(−2).(−7)][3.(−2).(−7)].[3.(−2).(−7)].[3.(−2).(−7)]
= 42.42.42=423
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a)=(-5)6=56
b)=(-6)3.(-7)3=[(-6)(-7)]3=423
c)=(-3).(-3)4.(-7)3(-7)2.(-2).(-2)4
=(-3)5.(-7)5.(-2)5
=[(-3)(-7)(-2)]5
=(-42)5
Bài 3 Viết các tích sau dưới dạng lũy thừa của một số nguyên
a (-8).(-3)mũ 3.125
b 27.(-2)mũ 3.(-7).49
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a. \(\left(-8\right).\left(-3\right)^3.125=\left(-2\right)^3.\left(-3\right)^3.5^3=\left[\left(-2\right).\left(-3\right).5\right]^3=30^3\)
b. \(27.\left(-2\right)^3.\left(-7\right).49=3^3.\left(-2\right)^3.\left(-7\right)^3=\left[3.\left(-2\right).\left(-7\right)\right]^3=42^3\)
a)=(-2)3.(-3)3.53
=[(-2)(-3)5]2
=303
b)=33.(-2)3.(-7)(-7)2
=33.(-2)3.(-7)3
=[3(-2)(-7)]3
=423
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27. − 2 3 . − 7 . + 49 = 3 3 . − 2 3 − 7 − 7 2 = 3 3 . − 2 3 . − 7 3 = 3. − 2 . − 7 3 = 42 3 .
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a. (-2).(-2).(-2).(-2).(-2).(-2) = (-2)6
b. (-4).(-4).(-4).(-4).(-5).(-5).(-5).(-5) = (-4)4.(-5)4=204
c. (-8).(-3)3.(-27) = (-2)3.(-3)3.(-3)3 = (-2)3.93 = (-18)3
d. (+49).(+7).(-2)3.27 = 72.7.(-2)3.33 = 73.(-2)3.33 = (-42)3
a) (-2) . (-2) . (-2) . (-2) . (-2) . (-2)
= (-2)\(^6\)
b) (-4) . (-4) . (-4) . (-4) . (-5) . (-5) . (-5) . (-5)
= (-4)\(^4\). (-5)\(^4\)
c) (-8) . (-3)\(^3\). (-27)
= (-2) . (-2) . (-2) . (-27) . (-27)
= (-2)\(^3\) . (-27)\(^2\)
d) 49 . 7 . (-2)\(^3\). 27
= 7 . 7 . 7 . (-2)\(^3\). 3 . 3 . 3
= 7\(^3\). (-2)\(^3\). 3\(^3\)
chúc bạn học tốt!!!
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a) \(\left(-8\right).\left(-3\right)^3.\left(+125\right)\\ =\left(-2\right)^3.\left(-3\right)^3.\left(+5\right)^3\\ =\left[\left(-2\right).\left(-3\right).\left(+5\right)\right]^3\\ =30^3\)
b) \(27.\left(-2\right)^3.\left(-7\right).\left(+49\right)\\ =3^3.\left(-2\right)^3.\left(-7\right).\left(-7\right)^2\\ =\left[3.\left(-2\right)\right]^3.\left[\left(-7\right).\left(-7\right)^2\right]\\ =\left(-6\right)^3.\left(-7\right)^3\\ =\left[\left(-6\right).\left(-7\right)\right]^3\\ =42^3\)