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Question Number 111393 by Aina Samuel Temidayo last updated on 03/Sep/20

$$\mathrm{What}\mathrm{is}\mathrm{the}\mathrm{sum}\mathrm{of}\mathrm{the}\mathrm{coefficients}\mathrm{in}\mathrm{the}$$$$\mathrm{expansion}\mathrm{of}{(2015\mathrm{v}-2015\mathrm{u}+1)}^{2015}?$$

Commented by mr W last updated on 03/Sep/20

$$1$$

Commented by Aina Samuel Temidayo last updated on 03/Sep/20

$$\mathrm{Solution}\mathrm{please}?$$

Commented by PRITHWISH SEN 2 last updated on 03/Sep/20

$$\mathrm{put}\mathrm{v}=\mathrm{u}=1$$

Commented by Aina Samuel Temidayo last updated on 03/Sep/20

$$\mathrm{Why}?$$

Commented by PRITHWISH SEN 2 last updated on 03/Sep/20

$$\mathrm{if}\mathrm{you}\mathrm{put}\mathrm{v}=\mathrm{u}=1\mathrm{then}\mathrm{the}\mathrm{v}\mathrm{and}\mathrm{u}\mathrm{will}\mathrm{vanish}$$$$\mathrm{from}\mathrm{the}\mathrm{expansion}\mathrm{and}\mathrm{only}\mathrm{the}\mathrm{coefficients}$$$$\mathrm{will}\mathrm{remain}.$$

Commented by Aina Samuel Temidayo last updated on 03/Sep/20

$$\mathrm{Oh}.\mathrm{Cool}.\mathrm{Thanks}.$$

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