Recent content by isaac200

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    Medical How can we protect ourselves from the harmful effects of UV rays?

    The organ affected by uv rays is the skin and eye.protection from the skin involve the used of long-sleeve,hand glove,uv skin block,and any opaque object shield us from uv.For eye protection we used polycarbonate safety glass. The disease cause by uv ray include cancer,sun burn(erythema),skin...
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    Undergrad Gravitational Attraction & Conservation of Energy

    The inertial mass will be the same anywhere because it is only weight that varies with gravitational energy.
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    Can You Solve These Linear Simultaneous Equations?

    Am sorry that this is post in the wrong position but this is the solution x^2+y^2+z^2=(x+y+z)^2-2(xy+yz+zx)=35 substitute x+y+z=1 we have (1)^2-2(xy+yz+zx)=35 therefore (xy+yz+zx)=-17 also x^3+y^3+z^3=(x+y+z)^3-3(x+y+z)(xy+yz+zx)+3(xyz)=97 therefore substitute we have (1)^3-3(1)(-17)+3(xyz)=97...
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    Can You Solve These Linear Simultaneous Equations?

    You are correctbut why don't you show your working?
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    Graduate Is the Number of Free Variables Constant in Echelon Form Systems?

    That's very good
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    Can You Solve These Linear Simultaneous Equations?

    Can any solve this x+y+z=1 x^2+y^2+z^2=35 x^3+y^3+z^3=97
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    Changing the variable in a differential system

    How can you solve this question x+y+z=1 x^2+y^2+z^2=35 x^3+y^3+z^3=97