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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
Trả lời :
( - 8 ) . ( -3 ) . ( + 125 )
=( -2)3. ( -3 ) 1 . 53
Học tốt !
\(a,\left(-7\right).\left(-7\right).\left(-7\right).\left(-7\right)\)
\(=\left(-7\right)^4=2401\)
\(b,\left(-3\right).\left(-3\right).\left(-3\right).\left(-4\right).\left(-4\right).\left(-4\right)\)
\(=\left(-3\right)^3.\left(-4\right)^3=12^3\)
\(c,4.9.25\)
\(=9.\left(4.25\right)=900=30^2\)
\(d,8.\left(-3\right)^3.\left(-125\right)\)
\(=\left(-3\right)^3.\left[\left( -125\right).8\right]\)
\(=\left(-3\right)^3.\left(-1000\right)\)
\(=\left(-3\right)^3.\left(-10\right)^3\)
\(=30^3\)
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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
a: \(=5^5\cdot32=10^5\)
b: \(=5^3\cdot\left(-2\right)^3\cdot\left(-3\right)^3\cdot1=30^3\)
c: \(=\left(-8\right)^5\cdot9^5=-72^5\)
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) \(27.\left(-2\right)^3.\left(-7\right).\left(+49\right)\\ =3^3.\left(-2\right)^3.\left(-7\right).\left(-7\right)^2\\ =\left[3.\left(-2\right)\right]^3.\left[\left(-7\right).\left(-7\right)^2\right]\\ =\left(-6\right)^3.\left(-7\right)^3\\ =\left[\left(-6\right).\left(-7\right)\right]^3\\ =42^3\)
− 8 . − 3 3 . + 125 = − 2 3 . − 3 3 .5 3 = − 2. − 3 .5 3 = 30 3