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If f(x) = 3x - 4, find f(-2).

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Question: If f(x) = 3x - 4, find f(-2).

Options:

  1. -10
  2. -8
  3. -6
  4. -4

Correct Answer: -10

Solution: 

f(-2) = 3(-2) - 4 = -6 - 4 = -10.

If f(x) = 3x - 4, find f(-2).

Practice Questions

Q1
If f(x) = 3x - 4, find f(-2).
  1. -10
  2. -8
  3. -6
  4. -4

Questions & Step-by-Step Solutions

If f(x) = 3x - 4, find f(-2).
  • Step 1: Identify the function f(x) = 3x - 4.
  • Step 2: Substitute -2 for x in the function. This means we replace x with -2.
  • Step 3: Calculate 3 times -2. This gives us 3 * -2 = -6.
  • Step 4: Now, subtract 4 from -6. So, -6 - 4 = -10.
  • Step 5: The final answer is f(-2) = -10.
  • Function Evaluation – The process of substituting a specific value into a function to find the corresponding output.
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