QUESTION IMAGE
Question
find the exact value of the following expression.
\\(\binom{8}{1}\\)
<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Binomial Theorem"
],
"new_concepts": [
"Binomial Coefficient"
],
"current_concepts": [
"Binomial Theorem",
"Binomial Coefficient"
]
}
</pre_analysis>
<reasoning>
State the binomial coefficient formula
\[
\binom{n}{k} = \frac{n!}{k!(n-k)!}
\]
Substitute the given values
\[
\]
Calculate the exact value
\[
\binom{8}{1} = \frac{8!}{1!(8-1)!} = \frac{8!}{1! \cdot 7!} = 8
\]
</reasoning>
<answer>
8
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Algebra",
"Binomial Coefficient"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Binomial Theorem"
],
"new_concepts": [
"Binomial Coefficient"
],
"current_concepts": [
"Binomial Theorem",
"Binomial Coefficient"
]
}
</pre_analysis>
<reasoning>
State the binomial coefficient formula
\[
\binom{n}{k} = \frac{n!}{k!(n-k)!}
\]
Substitute the given values
\[
\]
Calculate the exact value
\[
\binom{8}{1} = \frac{8!}{1!(8-1)!} = \frac{8!}{1! \cdot 7!} = 8
\]
</reasoning>
<answer>
8
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Algebra",
"Binomial Coefficient"
]
}
</post_analysis>