a_{1}a_{2} ... a_{m} = b_{1} b_{2} ... b_{m}
a_{1}^{k} + a_{2}^{k} + ... + a_{m}^{k} = b_{1}^{k} + b_{2}^{k} + ... + b_{m}^{k} ( k = k_{2} , k_{3 }, ... , k_{n} )
y = { ( a_{1}^{x}+a_{2}^{x}+a_{3}^{x}+a_{4}^{x}+a_{5}^{x} ) / 5 }^{1/x}  { ( b_{1}^{x}+b_{2}^{x}+b_{3}^{x}+b_{4}^{x}+b_{5}^{x} ) / 5 }^{1/x}







