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Question 4217: Complete Polynomial Sum Coefficients

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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R0007-04217 · q-20261008-advance-20261010-r01-polynomial-0017

Original question and givens

Integer polynomials have ascending coefficients f=[4, 17, 0, 1] and g=[1, -2, 2, -1], constant term first. Give the complete ascending coefficient list for f+g.

  • G001 — Integer polynomials have ascending coefficients f=[4, 17, 0, 1] and g=[1, -2, 2, -1], constant term first. Give the complete ascending coefficient list for f+g.

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

f ascending coefficients=[4, 17, 0, 1]

After

coefficient k multiplies x^k;keep all required degrees

Conditions: none

Coefficients are in ascending powers with the constant at index0.Full coefficient operations are not identities inferred from one-point agreement;retain the original coefficient list.

Step identifiers and dependencies

Rule: ascending_polynomial_identity · Uses: G001

S002 · calculation

Before

sum coefficient0 := sum(4, 1)

After

sum coefficient0 = 5

Conditions: none

Combine coefficients of the same power,padding a missing term with0.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S001

S003 · calculation

Before

sum coefficient1 := sum(17, -2)

After

sum coefficient1 = 15

Conditions: none

Combine coefficients of the same power,padding a missing term with0.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S002

S004 · calculation

Before

sum coefficient2 := sum(0, 2)

After

sum coefficient2 = 2

Conditions: none

Combine coefficients of the same power,padding a missing term with0.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S003

S005 · calculation

Before

sum coefficient3 := sum(1, -1)

After

sum coefficient3 = 0

Conditions: none

Combine coefficients of the same power,padding a missing term with0.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S004

S006 · implies

Before

[5, 15, 2]

After

canonical ascending coefficient list

Conditions: none

Coefficientwise addition preserves the polynomial identity;remove trailing zeros but retain[0] for the zero polynomial.

Step identifiers and dependencies

Rule: polynomial_sum_coefficients · Uses: G001, S005

Reverse checks

  • S006 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
  • S005 · premise_and_result_audit — Recompute sum coefficient3 with exact rational arithmetic, not rounded decimals.
  • S004 · premise_and_result_audit — Recompute sum coefficient2 with exact rational arithmetic, not rounded decimals.
  • S003 · premise_and_result_audit — Recompute sum coefficient1 with exact rational arithmetic, not rounded decimals.
  • S002 · premise_and_result_audit — Recompute sum coefficient0 with exact rational arithmetic, not rounded decimals.
  • S001 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.

Result

[5, 15, 2]

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: a6fa79bed493bc787a627e65d413dd461e0ff26b511dd4d68ec7a810c01d4cff
  • candidate record SHA-256: 98b03c374f5688c29e85416ce0beb42711eb9f4d80ee450dfaa72abd89d15cff
  • semantic review receipt SHA-256: faf0582c0184613e6fae207374056133eae600883a29c67d8438113bbe3c485a
  • question-first witness SHA-256: 4b283b6ff424b1d22caa36f3552b0fa21b1b66a0a883d7cbe9cedc8dd77b2e42
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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