Problem Analysis #42

57.08s
11,717 toks
Problem Statement

Consider the functionf(x)=12x2x+ln(1+x),f(x) = \frac{1}{2}x^2 - x + \ln(1 + x),and let tt be a positive real number. For s>0s > 0, let (s,f(s))(s, f(s)) be a point on the curve y=f(x)y = f(x). Let g(t)g(t) denote the value of ss such that the distance between the foot of the perpendicular from (s,f(s))(s, f(s)) to the yy-axis and the point where the tangent to the curve at (s,f(s))(s, f(s)) meets the yy-axis is equal to tt. Evaluate12274g(t)dt.\int_{\frac{1}{2}}^{\frac{27}{4}} g(t) \, dt.[4 points]\subsection*{Numerical answer}If the value is pq+ln2\frac{p}{q} + \ln 2, compute p+qp+q.\

Ground Truth
169
Execution Trace
Reasoning Process

157 + 12 = 169

Reasoning Process

[THOUGHT] I need to evaluate the integral ∫_{1/2}^{27/4} g(t) dt for the given function and definition of g(t). After deriving the relationship t = s^3/(1+s), I substitute to express the integral in terms of s from s=1 to s=3. The integrand simplifies to (2s^4 + 3s^3)/(1+s)^2, which I transform via u = s+1, leading to a rational function in u from u=2 to u=4. I then use Python to verify the definite integral calculation symbolically. [/THOUGHT] [PYTHON] from sympy import symbols, integrate, ln u = symbols('u') expr = 2u**2 - 5u + 3 + 1/u - 1/u**2 integral_expr = integrate(expr, u) u_sym = symbols('u') integral_at_4 = integral_expr.subs(u_sym, 4) integral_at_2 = integral_expr.subs(u_sym, 2) result = integral_at_4 - integral_at_2 print(result) [/PYTHON]

Tool Output
[PYTHON OUTPUT] -log(2) + log(4) + 157/12 [/PYTHON OUTPUT]
Reasoning Process

[ \boxed{169} ]

Final Model Output
169

Comparative Analysis (P42) (Average across runs)

Avg Time Taken

K-EXAONE-236B-A23B
4908.0
K-EXAONE-236B-A23B
294.8
Deepseek-V3.2
99.4
Solar-Open-100B
81.8
Llama-VARCO-8B-Instruct
79.8
Gemini-3-Pro-Preview
70.0
Kanana-2-30B-Thinking
66.6
A.X-4.0 (72B)
62.6
Kanana-2-30B-Thinking-2601
48.2
Grok-4.1-fast
47.3
Solar-Pro-2 (31B)(high)
43.4
HCX-007(high)
35.7
Claude-Opus-4.5
30.1
GPT-5.1 (high)
28.7
GPT-5.2 (high)
21.9
axk1
9.5
EXAONE-4.0.1-32B (high)
6.5

Avg Token Usage

K-EXAONE-236B-A23B
269441.0
K-EXAONE-236B-A23B
31499.3
Solar-Open-100B
14855.0
Gemini-3-Pro-Preview
13341.0
Kanana-2-30B-Thinking-2601
11147.0
Kanana-2-30B-Thinking
10289.0
Claude-Opus-4.5
9394.0
Solar-Pro-2 (31B)(high)
8403.0
Grok-4.1-fast
7387.0
A.X-4.0 (72B)
5760.0
Deepseek-V3.2
5146.0
GPT-5.2 (high)
4931.0
HCX-007(high)
4718.0
GPT-5.1 (high)
4687.0
EXAONE-4.0.1-32B (high)
4223.0
Llama-VARCO-8B-Instruct
3954.0
axk1
3358.0