Question

Wyznacz R ze wzoru D=(n-1)(1/r+1/R)

Answer 1

 

Answer 2

D = (n-1)(1/r + 1/R)  /:((n-1)

      Z: n-1 ≠ 0,  n ≈1 

1/r + 1/R = D/(n-1)

1/R = D/(n-1) - 1/r

1/R = [D*r-1(n-1)]/r(n-1)

R = r(n-1)/[D*r-(n-1)]