若2m+3n=5,求4^m*8^n的值
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若2m+3n=5,求4^m*8^n的值
4^m*8^n
=2^2m*2^3n
=2^(2m+3n)
=2^5
=32
再问: 1/4^2006*2^4010 ,会吗?要过程
再答: 1/4^2006*2^4010 =1/4*1/4^2005*4^2005 =1/4*(1/4*4)^2005 =1/4*1 =1/4
再问: 谢谢,但我这一方面不怎么好,还有一题,谢谢2(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7
再答: 2(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7 =2x^9-27x^9+25x^9 =0
=2^2m*2^3n
=2^(2m+3n)
=2^5
=32
再问: 1/4^2006*2^4010 ,会吗?要过程
再答: 1/4^2006*2^4010 =1/4*1/4^2005*4^2005 =1/4*(1/4*4)^2005 =1/4*1 =1/4
再问: 谢谢,但我这一方面不怎么好,还有一题,谢谢2(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7
再答: 2(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7 =2x^9-27x^9+25x^9 =0
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