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Graphs, MET2 2021 VCAA 4 MC

The maximum value of the function  `h : [0,2] -> R, \ h(x) = (x - 2)e^x`  is

  1. `-e`
  2. `0`
  3. `1`
  4. `2`
  5. `e`
Show Answers Only

`B`

Show Worked Solution

`text{Graph} \ \ y = (x – 2)e^x \ \ text{by CAS:}`

`text{Maximum value occurs at} \ \ x = 2`

`h(x)_max` `= (2-2) e^2`
  `= 0`

`=> B`

Filed Under: Graphs and Applications Tagged With: Band 4, smc-2745-10-Exponential Graphs

Algebra, MET2 2008 VCAA 17 MC

The graph of the function  `f(x) = e^(2x) - 2`  intersects the graph of  `g(x) = e^x`  where

  1. `x = -1`
  2. `x = log_e(2)`
  3. `x = 2`
  4. `x = (1 + sqrt 7)/2`
  5. `x = log_e((1 + sqrt 7)/2)`
Show Answers Only

`B`

Show Worked Solution

`text(Intersect when:)`

`e^(2x) – 2 = e^x`

`:. x = log_e(2)\ \ \ text{(By CAS)}`

`=>   B`

Filed Under: Graphs and Applications Tagged With: Band 3, smc-2745-10-Exponential Graphs

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