Instructions

Let $$V_r$$ denote the sum of the first r terms of an arithmetic progression (A.P.) whose first term is r and the common difference is $$(2r - 1)$$. Let
$$T_r = V_{r+1}-V_r-2$$ and $$Q_r = T_{r+1}-T_r$$ for r = 1, 2, ....

Question 59

$$T_r$$ is always


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