计算：
1. (m^2)^3 ·(2m)^4 ·(m)^2
2. (-x^4)^5 +(x^10)^2 -3[(-x)^2]^4
3. 0.6a^2 ·1/4 a^2b^3 -(-10a^4)·b^3
4. 2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(y-x)^8
帮一下忙啦~O(∩_∩)O谢谢！
把过程写出来好吗？ 到底是谁对啊？
1.
(m^2)^3 ·(2m)^4 ·(m)^2
=(m^2*3)*2^4*m^4*m^2
=m^6*2^4*m^4*m^2
=m^(6+2+4)*2^4
=16m^12
3.
0.6a^2 ·1/4 a^2b^3 -(-10a^4)*b^3
=6/10a^2 ·1/4 a^2b^3 -(-10a^4)*b^3
=6/10a^2 ·1/4 a^2b^3-（-10a^4*b^3)
=6/10a^2 ·1/4 a^2b^3+10a^4*b^3
=6/10*1/4*a^2*a^2*b^3+10a^4*b^3
=3/20a^4b^3+10a^4*b^3
=a^4*b^3(3/20+10)
=10又3/20*a^4*b^3
4.
2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(y-x)^8
=2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(x-y)^8
=(2/3·9/4·7/15)·(x-y)^3·(x-y)^5 ·(x-y)^8
=7/5*(x-y)^(3+5+8)
=7/5*(x-y)^16
(m^2)^3 ·(2m)^4 ·(m)^2
=(m^2*3)*2^4*m^4*m^2
=m^6*2^4*m^4*m^2
=m^(6+2+4)*2^4
=16m^12
3.
0.6a^2 ·1/4 a^2b^3 -(-10a^4)*b^3
=6/10a^2 ·1/4 a^2b^3 -(-10a^4)*b^3
=6/10a^2 ·1/4 a^2b^3-（-10a^4*b^3)
=6/10a^2 ·1/4 a^2b^3+10a^4*b^3
=6/10*1/4*a^2*a^2*b^3+10a^4*b^3
=3/20a^4b^3+10a^4*b^3
=a^4*b^3(3/20+10)
=10又3/20*a^4*b^3
4.
2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(y-x)^8
=2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(x-y)^8
=(2/3·9/4·7/15)·(x-y)^3·(x-y)^5 ·(x-y)^8
=7/5*(x-y)^(3+5+8)
=7/5*(x-y)^16
温馨提示：答案为网友推荐，仅供参考
第1个回答 2009-08-04
1.(m^2)^3 ·(2m)^4 ·(m)^2
=m^6*16m^4*m^2=16m^12
2. (-x^4)^5 +(x^10)^2 -3[(-x)^2]^4
=-x^20+x^20-3x^8=-3x^8
3. 0.6a^2 ·1/4 a^2b^3 -(-10a^4)·b^3
=0.15a^4b^3+10a^3b^4
4. 2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(y-x)^8
=7/10(x-y)^16
=m^6*16m^4*m^2=16m^12
2. (-x^4)^5 +(x^10)^2 -3[(-x)^2]^4
=-x^20+x^20-3x^8=-3x^8
3. 0.6a^2 ·1/4 a^2b^3 -(-10a^4)·b^3
=0.15a^4b^3+10a^3b^4
4. 2/3(x-y)^3 ·9/4(x-y)^5 ·7/15(y-x)^8
=7/10(x-y)^16
第2个回答 2009-08-04
1.2^4*m^(2^3+4+2)=2^4*m^14
以下都是一个道理。主要你要懂得公式。
m^x*m^y=m^(x+y)
以下都是一个道理。主要你要懂得公式。
m^x*m^y=m^(x+y)
第3个回答 2009-08-04
1. 16m^12
2. -3x^8
3. 10.15a^4b^3
4. 0.7(x-y)^16
2. -3x^8
3. 10.15a^4b^3
4. 0.7(x-y)^16
第4个回答 2009-08-04
1.m^2(m3^X4mXm)
2.-x^6(3x^-x^14-3x)
3.a^2b^3(3/20+10a^2)
4.7/10(x-y)^16
2.-x^6(3x^-x^14-3x)
3.a^2b^3(3/20+10a^2)
4.7/10(x-y)^16
