已知n为自然数,且x^2n=3,求(-3\1x^3n)^4÷[4(x^2)^2n]的值
问题描述:
已知n为自然数,且x^2n=3,求(-3\1x^3n)^4÷[4(x^2)^2n]的值
答
(-x^3n/3)^4÷[4(x^2)^2n]
=x^12n/3^4÷[4*x^4n]
=x^(12n-4n)/(3^4*4)
=x^(8n)/(3^4*4)
=[x^(2n)]^4/(3^4*4)
=3^4/(3^4*4)
=1/4