计算-(n/m^2)/(n^2/m^3)/(m/n^2)已知x为整数,且分式2x+2/x^2-1的值为整数,则x可取的值为
问题描述:
计算-(n/m^2)/(n^2/m^3)/(m/n^2)
已知x为整数,且分式2x+2/x^2-1的值为整数,则x可取的值为
答
.n
答
计算-(n/m^2)/(n^2/m^3)/(m/n^2)
-n/m²÷n²/m³÷m/n²
=-n/m²×m³/n²×n²/m
=-n
已知x为整数,且分式2x+2/x^2-1的值为整数,则x可取的值为
2(x+1)/(x+1)(x-1)=2/(x-1)
x-1=1,-1,2,-2
x=2,0,3,-1