If 4,21,29,1 are subtracted from the four numbers in the equal ratio sequence, and the new four numbers are transformed into the equal difference sequence, the four numbers can be calculated

Arithmetic sequence: A, AK, AK ^ 2, AK ^ 3 arithmetic sequence: A-4, ak-21, AK ^ 2-29, AK ^ 3-1 (AK ^ 3-1) - (AK ^ 2-29) = (AK ^ 2-29) - (ak-21) (AK ^ 2-29) - (ak-21) = (ak-21) - (A-4) AK ^ 3 - 2 * AK ^ 2 + AK + 36 = 0ak ^ 2 - 2 * AK + A + 9 = 0k * (AK ^ 2 - 2 * a

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