przekształć wzór 1/x + 1/y =5 (1/x +1/y to ułamki) i wyznacz x dzieki :)
(x+y)/xy=5
x+y=5xy
x-5xy=-y
x(1-5y)=-y
x=-y/(1-5y)
1/x+1/y=5
y/xy+x/xy=5
y=5xy-x
y=x(5y-1)
x=y/(5y-1)
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(x+y)/xy=5
x+y=5xy
x-5xy=-y
x(1-5y)=-y
x=-y/(1-5y)
1/x+1/y=5
y/xy+x/xy=5
(x+y)/xy=5
x+y=5xy
y=5xy-x
y=x(5y-1)
x=y/(5y-1)