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| rev | Admin | (Created page with "'''Solution: D''' Year <math>t</math> principal repaid is <math>i a_{\overline{n-t+1}|i}=1-\nu^{n-t+1}.</math> Year <math>t+1</math> interest is <math>1-\bigl(1-{y^{n-t}}\bigr)={\nu}^{n-t} </math> <math>X=1-\nu^{n-t+1}+\nu^{n-t}=1+\nu^{n-t}(1-\nu)=1+\nu^{n-t}d.</math> {{soacopyright | 2023 }}") | Nov 18'23 at 22:01 | +297 |