The left hand solution would yield convergence because you can produce a "staircase diagram" (is this in your textbook?). You can also get "cobweb diagrams" to illustrate convergence.

For the right hand solution, the diagram would show that the successive iterations move away from the root, called divergence.

For the right hand solution, the diagram would show that the successive iterations move away from the root, called divergence.

Original post by vc94

The left hand solution would yield convergence because you can produce a "staircase diagram" (is this in your textbook?). You can also get "cobweb diagrams" to illustrate convergence.

For the right hand solution, the diagram would show that the successive iterations move away from the root, called divergence.

For the right hand solution, the diagram would show that the successive iterations move away from the root, called divergence.

Ah this is what I needed to know- thanks! No, this wasn’t mentioned: it was part of a homework for GCSE and I wasn’t sure why one method was correct and the other wasn’t.

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