(m+n-p)(p-m-n)(m-p-n)4(p+n-m)2等于( )A.-(m+n-p)2(p+n-m)6B.(m+n-p)2(m-n-p)6C.(-m+n
题型:单选题难度:一般来源:不详
(m+n-p)(p-m-n)(m-p-n)4(p+n-m)2等于( )A.-(m+n-p)2(p+n-m)6 | B.(m+n-p)2(m-n-p)6 | C.(-m+n+p)8 | D.-(m+n+p)8 |
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答案
由于p-m-n和(m+n-p)互为相反数, ∴p-m-n=-(m+n-p); p+n-m和m-p-n互为相反数,(p+n-m)2=(m-p-n)2, ∴原式=-(m+n-p)(m+n-p)(p+n-m)4(p+n-m)2=-(m+n-p)2(p+n-m)6. 故选A. |
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