分式的乘除法 要详细过程
计算:(c/2ab)²·(-b/ac)^3÷(-b/a)^4(3-a²)/(a²+2a+1)+【1-(1/a+1)】÷【1+(1/a-1)】...
计算: (c/2ab)² ·(-b/ac)^3 ÷ (-b/a)^4
(3-a²)/(a²+2a+1)+【1-(1/a+1)】÷【1+(1/a-1)】
1/(2-a)-【(a+2/a²-2a)-(a-1/a²-4a+4)】÷a -4/2a 展开
(3-a²)/(a²+2a+1)+【1-(1/a+1)】÷【1+(1/a-1)】
1/(2-a)-【(a+2/a²-2a)-(a-1/a²-4a+4)】÷a -4/2a 展开
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(c/ab)² ·(-b/ac)^3 ÷ (-b/a)^4
=(c^2/a^2b^2) •(-b^3/a^3c^3)•(a^4/b^4)
=-1/(ab^3c)
(3-a²)/(a²+2a+1)+【1-(1/a+1)】÷【1+(1/a-1)】
=(3-a²)/(a²+2a+1)+a/(a+1)÷a/(a-1)
=(3-a²)/(a+1)²+(a-1)/(a+1)
=(3-a²+a²-1)/(a+1)²
=2/(a+1)²
1/(2-a)-【(a+2/a²-2a)-(a-1/a²-4a+4)】÷a -4/2a
=-1/(a-2)-(a-4)/a(a-2)²•2a/(a-4)
=-1/(a-2)-2/(a-2)²
=-a/(a-2)²
=(c^2/a^2b^2) •(-b^3/a^3c^3)•(a^4/b^4)
=-1/(ab^3c)
(3-a²)/(a²+2a+1)+【1-(1/a+1)】÷【1+(1/a-1)】
=(3-a²)/(a²+2a+1)+a/(a+1)÷a/(a-1)
=(3-a²)/(a+1)²+(a-1)/(a+1)
=(3-a²+a²-1)/(a+1)²
=2/(a+1)²
1/(2-a)-【(a+2/a²-2a)-(a-1/a²-4a+4)】÷a -4/2a
=-1/(a-2)-(a-4)/a(a-2)²•2a/(a-4)
=-1/(a-2)-2/(a-2)²
=-a/(a-2)²
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