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Question 1376: Antiderivative Value Retaining the Actual Constant

On this page
  1. Original question and givens
  2. Definition and scope
  3. Step-by-step derivation
  4. Reverse checks
  5. Result
  6. This question review and source binding

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← Question derivation index · Original question batch

R0001-01376 · q-20261007-advance-20261008-r06-antiderivative-0076

Original question and givens

On all R, f has ascending coefficients [1, 2], starting with its constant term. Let F0 be its zero-constant primitive. Find F0(0)+(0), retaining the actual additive constant. Give a reduced fraction with positive denominator, retaining /1 for integers.

  • G001 — On all R, f has ascending coefficients [1, 2], starting with its constant term. Let F0 be its zero-constant primitive. Find F0(0)+(0), retaining the actual additive constant. Give a reduced fraction with positive denominator, retaining /1 for integers.

Definition and scope

Use the original question domain, assumptions and cited MKO definitions. This item has second-context mathematical and bilingual review, with the model, answer and every arithmetic step independently recomputed from the original parameters; the source question remains a candidate.

Step-by-step derivation

S001 · implies

Before

domain=R; coefficient lists are in ascending powers

After

constant term first; rational pairs=[numerator,denominator]

Conditions: none

Fix coefficient order;do not read ascending coefficients as descending or swap numerator and denominator.

Step identifiers and dependencies

Rule: polynomial_representation · Uses: G001

S002 · implies

Before

f coefficients ascending=[1, 2]

After

seek F₀ with constant coefficient0 and F₀′=f

Conditions: none

Antiderivatives are not generally unique; this task additionally fixes the constant coefficient at0.

Step identifiers and dependencies

Rule: canonical_primitive_domain · Uses: G001, S001

S003 · calculation

Before

primitive coefficient at degree1 := div(1, 1)

After

primitive coefficient at degree1 = 1

Conditions: none

Since (x^(k+1))′=(k+1)x^k,divide the coefficient by the positive nonzero integer k+1.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S002

S004 · calculation

Before

differentiate back coefficient0 := mul(1, 1)

After

differentiate back coefficient0 = 1

Conditions: none

Differentiation multiplies back by k+1 and must recover the original coefficient.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S003

S005 · calculation

Before

primitive coefficient at degree2 := div(2, 2)

After

primitive coefficient at degree2 = 1

Conditions: none

Since (x^(k+1))′=(k+1)x^k,divide the coefficient by the positive nonzero integer k+1.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S004

S006 · calculation

Before

differentiate back coefficient1 := mul(1, 2)

After

differentiate back coefficient1 = 2

Conditions: none

Differentiation multiplies back by k+1 and must recover the original coefficient.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S005

S007 · implies

Before

[0, 1, 1]

After

all derivative coefficients agree with f

Conditions: none

Coefficient agreement proves the polynomial identity on all reals,not merely equality at a few points.

Step identifiers and dependencies

Rule: global_polynomial_identity · Uses: G001, S006

S008 · calculation

Before

constant coefficient+C := sum(0, 0)

After

constant coefficient+C = 0

Conditions: none

Change only the constant coefficient;the derivative remains the same f.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S007

S009 · calculation

Before

F(x) multiply at degree2 := mul(0, 0)

After

F(x) multiply at degree2 = 0

Conditions: none

In Horner order, multiply by the same evaluation point first.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S008

S010 · calculation

Before

F(x) add coefficient2 := sum(0, 1)

After

F(x) add coefficient2 = 1

Conditions: none

Then add the exact rational coefficient for this degree.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S009

S011 · calculation

Before

F(x) multiply at degree1 := mul(1, 0)

After

F(x) multiply at degree1 = 0

Conditions: none

In Horner order, multiply by the same evaluation point first.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S010

S012 · calculation

Before

F(x) add coefficient1 := sum(0, 1)

After

F(x) add coefficient1 = 1

Conditions: none

Then add the exact rational coefficient for this degree.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S011

S013 · calculation

Before

F(x) multiply at degree0 := mul(1, 0)

After

F(x) multiply at degree0 = 0

Conditions: none

In Horner order, multiply by the same evaluation point first.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S012

S014 · calculation

Before

F(x) add coefficient0 := sum(0, 0)

After

F(x) add coefficient0 = 0

Conditions: none

Then add the exact rational coefficient for this degree.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S013

S015 · implies

Before

x=0; additive constant=0

After

F(x)=0/1

Conditions: none

Use a reduced positive-denominator fraction,retaining /1 even for integers.

Step identifiers and dependencies

Rule: primitive_value_format · Uses: G001, S014

Reverse checks

  • S015 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S014 · premise_and_result_audit — Recompute F(x) add coefficient0 with exact rational arithmetic, not rounded decimals.
  • S013 · premise_and_result_audit — Recompute F(x) multiply at degree0 with exact rational arithmetic, not rounded decimals.
  • S012 · premise_and_result_audit — Recompute F(x) add coefficient1 with exact rational arithmetic, not rounded decimals.
  • S011 · premise_and_result_audit — Recompute F(x) multiply at degree1 with exact rational arithmetic, not rounded decimals.
  • S010 · premise_and_result_audit — Recompute F(x) add coefficient2 with exact rational arithmetic, not rounded decimals.
  • S009 · premise_and_result_audit — Recompute F(x) multiply at degree2 with exact rational arithmetic, not rounded decimals.
  • S008 · premise_and_result_audit — Recompute constant coefficient+C with exact rational arithmetic, not rounded decimals.
  • S007 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S006 · premise_and_result_audit — Recompute differentiate back coefficient1 with exact rational arithmetic, not rounded decimals.
  • S005 · premise_and_result_audit — Recompute primitive coefficient at degree2 with exact rational arithmetic, not rounded decimals.
  • S004 · premise_and_result_audit — Recompute differentiate back coefficient0 with exact rational arithmetic, not rounded decimals.
  • S003 · premise_and_result_audit — Recompute primitive coefficient at degree1 with exact rational arithmetic, not rounded decimals.
  • S002 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S001 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.

Result

0/1

The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.

This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.

Source hashes and review receipts
  • input commit: 0f7be61e2c22317a4075561dc822c87d881a50db
  • original question SHA-256: 204c92ab008d1f96061637de42852d45b42deab6c959d253a76fd3f4de25cb6f
  • candidate record SHA-256: 99092d9cc6deb616cb4abcd60ae32db6f9610890dea14ae4e35a465fa4d14d5f
  • semantic review receipt SHA-256: c3b44ce8ed60ada6902fb206627537d5f90ba2a867eaba43a36f903280c496cc
  • question-first witness SHA-256: 3e91602adc7f81a2671a2a3ffaf6a447028b56abc5853e8271673d76f30cd7ad
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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