如果x方-2x-1=0,求x方/(x的4次-3x方+1) 等
问题描述:
如果x方-2x-1=0,求x方/(x的4次-3x方+1) 等
wo 要
答
数学之美团为你解答x² - 2x - 1 = 0同除以 xx - 2 - 1/x = 0x - 1/x = 2平方x² - 2 + 1/x² = 4x² - 3 + 1/x² = 3(x⁴ - 3x² +1)/x² = 3x²/(x⁴-3x²+1) = 1/...