Recent content by Albert1

my solution:

solution for :$y_2=2y_1$

hint for range of y

please give a hint how to find the region of $R$ for $ y $ is hard to express in $x$

another solution:

(1)$12^2+39^2+a^2=b^2$ find $a,b$ $a,b\in N$ (2)$24^2+36^2+a^2=b^2$ find $a,b$ $a,b\in N$ (3)$15^2+9^2+a^2=b^2$ find $a,b$ $a,b\in N$

my solution:

hint of (3)$\dfrac{1}{x}+\dfrac{1}{y}+\dfrac {1}{z}=\dfrac{6}{24}$

my solution:

$(1)$ $\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{7}{8}(x,y\in N)$ $find$: $x,y$ $(2)$ $\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{6}{12}(x,y\in N)$ $find$: $x,y$ $(3)$ $\dfrac{1}{x}+\dfrac{1}{y}+\dfrac {1}{z}=\dfrac{6}{24}(x,y,z\in N)$ $find$: $x,y,z$