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Input:
rsolve(y(x+1)-y(x)=x)
Write:
`rsolve(y(x+1)-y(x)=x)`
Compute:
$$rsolve(y(x+1) - y(x)=x)$$
Output:
$$rsolve(y(x+1) - y(x)=x)== C_1-\frac{1}{2}\ n-\frac{1}{2}\ {n}^{2}$$
Result: $$C_1-\frac{1}{2}\ n-\frac{1}{2}\ {n}^{2}$$
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