【积的乘方】这4题怎么做,要过程,谢谢!-(2ab²)³=(ab²)²·(-a³b)³·(-5ab)=[(1/2)²]³乘以(2³)³=(-0.25)^5乘以2^10(化简)=
问题描述:
【积的乘方】这4题怎么做,要过程,谢谢!
-(2ab²)³=
(ab²)²·(-a³b)³·(-5ab)=
[(1/2)²]³乘以(2³)³=
(-0.25)^5乘以2^10(化简)=
答
-8a^3b^6
(a^2b^4)*(-a^9b^3)*(-5ab)
=5a^12b^8
1/(2^6)*2^9=2^3
-1/(2^10)*2^10=-1
答
-(2ab²)³
=-8a^3b^6
(ab²)²·(-a³b)³·(-5ab)
=a^2b^4*(-a^9b^3)*(-5ab)
=a^2b^4*a^9b^3*5ab
=5a^(2+9+1)b^(4+3+1)
=5a^12b^8
[(1/2)²]³*(2³)³
=[(1/2)²*2³]^3
=[1/4*8]^3
=2^3
=8
(-0.25)^5*2^10(化简)
=(-1/4)^5*2^10
=-(1/4)^5 *2^10
=-[(1/2)^2]^5*2^10
=-(1/2)^10*2^10
=-(1/2*2)^10
=-1^10
=-1