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Logarithmic Functions Solutions

  • Using technology, think about the following questions, and then reveal the answers.
  • Use the function:  f(x)=a logbx–h+k 
  • Start with h = 0, and k = 0.
  1. What is the end behavior when a > 0 and 0 < b < 1?

As x→+∞, g(x)→–∞, and as x→0, g(x)→+∞

  1. What is the end behavior when a > 0 and b > 1?

As x→+∞, g(x)→+∞, and as x→0, g(x)→–∞

  1. What is the end behavior when a < 0 and 0 < b < 1?

As x→+∞, g(x)→+∞, and as x→0, g(x)→–∞

  1. What is the end behavior when a < 0 and b > 1?

As x→+∞, g(x)→–∞, and as x→0, g(x)→+∞

  1. What happens to the graph when the values of h and k do not equal 1 (are something other than zero)?

The graph translates (slides) right/left and up/down.

Use of the Desmos Graphing Calculator and other Desmos Tools is used with permission from Desmos Studio, PBC.

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