1)(-5)^15*(-2)^15;
=[(-5)*(-2)]^15
=10^15
2)2^4*4^5*(-0.125)^4
=[2*4*(-0.125)]^4
=(-1)^4
=1第二题错了2^4*4^5*(-0.125)^4=[2*4*(-0.125)]^4×4=(-1)^4×4=1×4=4[2*4*(-0.125)]^4×4怎么来的??4^5=4^4×4 2^4*4^5*(-0.125)^4=2^4*4^5*(-0.125)^4×4利用a^m×b^m=(ab)^m来做
用简便方法计算:1)(-5)^15*(-2)^15; 2)2^4*4^5*(-0.125)^4
用简便方法计算:1)(-5)^15*(-2)^15; 2)2^4*4^5*(-0.125)^4
数学人气:241 ℃时间:2019-10-20 00:21:16
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