Mathematics
Grade10
Easy

Question

For the function g left parenthesis x right parenthesis equals 2 x plus 3, find the value of  g left parenthesis negative 1 right parenthesis plus g left parenthesis 1 right parenthesis

  1. 1
  2. 4
  3. 5
  4. 6

hintHint:

In this question function g(x) is given we have to first find g(-1) and g(1) by replacing the x with the values and then add the obtained result as asked in the question.

The correct answer is: 6


    Given function g left parenthesis x right parenthesis equals 2 x plus 3
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell g left parenthesis negative 1 right parenthesis equals 2 cross times left parenthesis negative 1 right parenthesis plus 3 equals negative 2 plus 3 equals 1 end cell row cell g left parenthesis 1 right parenthesis equals 2 cross times 1 plus 3 equals 5 end cell row cell g left parenthesis negative 1 right parenthesis plus g left parenthesis 1 right parenthesis equals 1 plus 5 equals 6 end cell end table
    So, the value of g(-1) + g(1) is 6.

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