∫Calc Practice

Derivative of \( \displaystyle e^{\left(2 x - 1\right)^{2} + 1} \)

Problem 2.616 · hard

Differentiate \( \displaystyle f(x) = e^{\left(2 x - 1\right)^{2} + 1} \).
  1. \[ \frac{d}{d x} e^{\left(2 x - 1\right)^{2} + 1} \]
    derivativeStart with the derivative of the function.✓ Proved
  2. \[ = e^{\left(2 x - 1\right)^{2} + 1} \frac{d}{d x} \left(\left(2 x - 1\right)^{2} + 1\right) \]
    chainApply the chain rule.✓ Proved
  3. \[ = \left(\frac{d}{d x} 1 + \frac{d}{d x} \left(2 x - 1\right)^{2}\right) e^{\left(2 x - 1\right)^{2} + 1} \]
    sumDifferentiate the sum inside the parentheses.✓ Proved
  4. \[ = e^{\left(2 x - 1\right)^{2} + 1} \frac{d}{d x} \left(2 x - 1\right)^{2} \]
    constant algebraThe derivative of a constant is zero. Simplify the expression by removing the zero term.✓ Proved
  5. \[ = \left(4 x - 2\right) e^{\left(2 x - 1\right)^{2} + 1} \frac{d}{d x} \left(2 x - 1\right) \]
    powerApply the power rule and chain rule to the squared term.✓ Proved
  6. \[ = \left(8 x - 4\right) e^{\left(2 x - 1\right)^{2} + 1} \]
    derivative algebra simplifyDifferentiate the linear term inside. Multiply the constants. Distribute and simplify the final expression.✓ Proved
Answer \( \left(8 x - 4\right) e^{\left(2 x - 1\right)^{2} + 1} \)

✓ Nihil obstat Every line of this solution was proved by the computer algebra system SymPy. The answer was also checked a second way, without looking at the solution. Reviewers found nothing wrong with the explanation.

The full receipt
LineStatusChecked byDetail
1✓ Provedsympy 1.14.0line 1 is the problem as stated
2✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
3✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
4✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
5✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
6✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
7✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
8✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
9✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
answer✓ Provedsympy 1.14.0final line against the stated answer: simplify(a - b) reduced to 0
answer, a second way✓ Provedsympy 1.14.0SymPy differentiated f directly and got the stated answer

Reviewers

  • gpt-oss:20b: pass
  • qwen3.6:27b-mlx: fail (style) — Step 6 applies both the power rule and the chain rule simultaneously, violating the one-rule-per-step constraint. It should be split into a power rule step and a subsequent chain rule step.
Every verdict on record (4)
  • qwen3.6:27b-mlx: fail (style) 2026-09-21 — Step 6 applies both the power rule and the chain rule simultaneously, violating the one-rule-per-step constraint. It should be split into a power rule step and a subsequent chain rule step.
  • gpt-oss:20b: pass 2026-09-21
  • qwen3.6:27b-mlx: fail (style) 2026-09-21 — Step 6 applies both the power rule and the chain rule simultaneously, violating the one-rule-per-step constraint. It should be split into a power rule step followed by a chain rule step.
  • gpt-oss:20b: pass 2026-09-21

Proved: SymPy reduced the difference between the two sides to zero. Checked independently: a separate method, named above, confirmed it. Checked numerically: the two sides agree at every sampled point, which is evidence, not proof. Reviewed: a model or a person read it; that is all a sentence can have. Solution by gemma4:26b, checked 2026-09-26 with SymPy 1.14.0.