1.(-1)^1/3+(-8)^1/3+(-27)^1/3+(-64)^1/3+(岁亮-5^3)^1/3+......+(派雀铅-2009)^1/3=-1+(-2)+(-3)+(-4)+......+(-2009)=-(1+2009)*2009/尘好2=-1005*2009=-20190452.看不到图3. a^2+b^2=c^2=(a-b)^2+16 ab=8 c=(a^2+b^2)^1/2=