Matematické Fórum

Sunnyy · 25. 05. 2009 10:15

Prosil bych o pomoc s tímhle..Příklad je jako dopočítanej, ale nevím si rady, kam se z 2.kroku ztratila ta $http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=-2r%5E2s%5E2$ jak se jako došlo k tomu 3 kroku?

$http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=%5B(%5Cfrac%7Bs%7D%7Br-s%7D%2B%5Cfrac%7Br%7D%7Br%2Bs%7D)*%20(%5Cfrac%7Br%5E2%20%7D%7Bs%5E2%7D%2B%5Cfrac%7Bs%5E2%7D%7Br%5E2%7D-2%20)%5D%5Cdiv%5Cfrac%7Br%5E4-s%5E4%7D%7Br%5E2*s%5E2%7D%3D$

$http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=%5B%5Cfrac%7Bs*(r%2Bs)%2Br*(r-s)%7D%7B(r-s)*(r%2Bs)%7D*%5Cfrac%7Br%5E4%2Bs%5E4-2r%5E2s%5E2%7D%7Bs%5E2*r%5E2%7D%5D%20*%20%5Cfrac%7Br%5E2*s%5E2%7D%7Br%5E4-s%5E4%7D$ =

$http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=%5B%5Cfrac%7Bs*(r%2Bs)%2Br*(r-s)%7D%7B(r-s)(r%2Bs)%7D*%5Cfrac%7B(r%5E2-s%5E2)%5E2%7D%7Bs%5E2*r%5E2%7D*%5Cfrac%7Br%5E2*s%5E2%7D%7B(r%5E2-s%5E2)*(r%5E2%2Bs%5E2)%7D$ =

$http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=%5B%5Cfrac%7Bs*(r%2Bs)%2Br*(r-s)%7D%7B(r-s)(r%2Bs)%7D*%5Cfrac%7B(r-s)(r%2Bs)%7D%7Br%5E2%2Bs%5E2%7D%3D$

$http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=%5Cfrac%7Bs*(r%2Bs)%2Br*(r-s)%7D%7Br%5E2%2Bs%5E2%7D%3D$

$http://www.sitmo.com/gg/latex/latex2png.2.php?z=100&eq=%5Cfrac%7Bsr%2Bs%5E2%2Br%5E2-rs%7D%7Br%5E2%2Bs%5E2%7D$