原題與已知條件
固定另一座標的多項式切片。操作=partialdeep-slice-difference-quotient-limit;資料={"coefficients":[-4,1,-2,1,1,1],"x":1,"y":-2}。請依 [coefficients,x,y,quotient_coefficients,quotient_formula,limit,scope] 欄序回答。
G001 — 固定另一座標的多項式切片。操作=partialdeep-slice-difference-quotient-limit;資料={"coefficients":[-4,1,-2,1,1,1],"x":1,"y":-2}。請依 [coefficients,x,y,quotient_coefficients,quotient_formula,limit,scope] 欄序回答。
逐步推導
S001 · implies
操作前
source roles = [qf-mod25-partialdeep-slice-difference-quotient-limit, [coefficients, domain, operation, x, y]]
操作後
derived = [partialdeep-slice-difference-quotient-limit, Polynomial_partial_derivative_density]
條件:無
原bank的operation是LOCAL hyphen,keys與domain各自精確匹配。欄位順序及數字/Boolean/字串角色依來源,所有有理數文字整數省略/1;不改原題與英文、MKO、AST或狀態。
步驟識別與依賴
規則:R66_EXACT_source_bank_keys_local_operation_domain · 依賴:G001
S002 · implies
操作前
source roles = [[-4, 1, -2, 1, 1, 1]]
操作後
derived = [1, x, y, x^2, x*y, y^2]
條件:無
六係數依[1,x,y,x²,xy,y²]完整排列。偏導時另一座標固定;這個完整多項式支持符號恆等式,不從一個差分樣本猜導數或推一般函數全微分。
步驟識別與依賴
規則:Partial_FULL_polynomial_basis_and_fixed_other_coordinate · 依賴:G001, S001
S003 · calculation
操作前
Quotient ORIGINAL twice c_xx := mul(2, 1)
操作後
Quotient ORIGINAL twice c_xx = 2
條件:無
按本步原操作數與次序精確運算;來源有理數的pre-reduction界另行保留,不用浮點或偷偷跨bank放寬。
步驟識別與依賴
規則:exact_rational_arithmetic · 依賴:G001, S002
S004 · calculation
操作前
Quotient ORIGINAL twice c_xx times x := mul(2, 1)
操作後
Quotient ORIGINAL twice c_xx times x = 2
條件:無
按本步原操作數與次序精確運算;來源有理數的pre-reduction界另行保留,不用浮點或偷偷跨bank放寬。
步驟識別與依賴
規則:exact_rational_arithmetic · 依賴:G001, S003
S005 · calculation
操作前
Quotient ORIGINAL c_xy times fixed y := mul(1, -2)
操作後
Quotient ORIGINAL c_xy times fixed y = -2
條件:無
按本步原操作數與次序精確運算;來源有理數的pre-reduction界另行保留,不用浮點或偷偷跨bank放寬。
步驟識別與依賴
規則:exact_rational_arithmetic · 依賴:G001, S004
S006 · calculation
操作前
Quotient ORIGINAL all linear h coefficients := sum(1, 2, -2)
操作後
Quotient ORIGINAL all linear h coefficients = 1
條件:無
按本步原操作數與次序精確運算;來源有理數的pre-reduction界另行保留,不用浮點或偷偷跨bank放寬。
步驟識別與依賴
規則:exact_rational_arithmetic · 依賴:G001, S005
S007 · implies
操作前
source roles = [[-4, 1, -2, 1, 1, 1], 1, -2]
操作後
derived = [u(x+h,y)-u(x,y)=(1)*h+(1)*h^2]
條件:無
展開全部原六項並相減:常數/y/y²項消去,x項給c_x*h,x²項給2*c_xx*x*h+c_xx*h²,xy項給c_xy*y*h。這是每個h的符號恆等式。
步驟識別與依賴
規則:Partial_SYMBOLIC_difference_expand_ALL_six_terms · 依賴:G001, S006
S008 · implies
操作前
source roles = [1, 1, 1, -2]
操作後
derived = [[1, 1], 1, h!=0 before division;h->0 afterwards]
條件:無
只在h≠0除以h,差商成constant+c_xx*h,再由多項式連續性取h→0得constant。h=0時原差商未定義,不能先代0作0/0;有限差分不是此極限證明。
步驟識別與依賴
規則:Partial_CANCEL_h_ONLY_nonzero_THEN_polynomial_limit · 依賴:G001, S007
結論
([-4, 1, -2, 1, 1, 1], 1, -2, [1, 1], quotient=constant+h_coefficient*h for h≠0, 1, symbolic_limit_not_finite_difference)
依上列完整代值及條件核對得到原題答案;原題編號、格式與狀態保持不變。