Respuesta :

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Answer:

We must prove that (c+a)(c+d) = (b+c)(b+d)

  1. Let us use principles from mathematical induction
  2. [tex] \frac{a}{b} = \frac{b}{c} = \frac{c}{d} = x[/tex]
  3. a=bx , b=cx, c=dx
  4. a+c = b + c
  5. c +d = b + d
  6. Such that (a+c)(c+d)=(b+c)(b+d)

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