question 20 (5 points)
evaluate $2^x - 2$ for $x = 0$, $x = 1$, and $x = 2$.
a) -1, 1, 2
b) 0, 1, 2
c) -1, 0, 2
d) 1, 2, 4

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Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Exponential Functions" ], "new_concepts": [], "current_concepts": [ "Exponential Functions", "Evaluating Functions" ] } ## Evaluate the expression for x = 0 $$ 2^0 - 2 = 1 - 2 = -1 $$ ## Evaluate the expression for x = 1 $$ 2^1 - 2 = 2 - 2 = 0 $$ ## Evaluate the expression for x = 2 $$ 2^2 - 2 = 4 - 2 = 2 $$

A) $-1, 1, 2$

B) $0, 1, 2$

C) $-1, 0, 2$

D) $1, 2, 4$

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Algebra", "Exponential Functions" ] }

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Explanation:

Evaluate the expression for x = 0

Evaluate the expression for x = 1

Evaluate the expression for x = 2

Answer: