Problem Analysis #4

Kimi K3 · Run 1

Correct
9.95s
546 toks

API · no tools. This is the prompt and response recorded for this attempt; a full solution may not have been returned.

Problem Statement

This is a Korean CSAT mathematics multiple-choice problem. Solve it and put only the correct choice symbol, one of ①, ②, ③, ④, ⑤, inside \boxed{}.

Problem 5 For the function f(x) = (x+ 2)(2x 2 −x−2), computef ′(1). [3 points] ①6 ②7 ③8 ④9 ⑤10

Ground Truth
Recorded model response / solution
Reasoning Process

Using the product rule:

Let u=x+2u=x+2, v=2x2x2v=2x^2-x-2.
Then u=1u'=1, v=4x1v'=4x-1.

f(1)=u(1)v(1)+u(1)v(1)f'(1)=u'(1)v(1)+u(1)v'(1)

Compute at x=1x=1:

  • v(1)=212=1v(1)=2-1-2=-1
  • u(1)=3u(1)=3
  • v(1)=41=3v'(1)=4-1=3
f(1)=(1)+33=8f'(1)=(-1)+3\cdot 3=8

\boxed{③}

Final Model Output

Comparative Analysis (P4) (Average across runs)

Averages use reported measurements only. Missing usage is not treated as zero.

Avg Time Taken

Kimi K3
11.8
Motif 3
11.7
Solar Pro 4
9.0
K-EXAONE-2
0.8

Avg Token Usage

Solar Pro 4
782.3
Kimi K3
601.0
K-EXAONE-2
410.0
    CSAT 2026 · Problem 4 · Kimi K3 | EntropyMath