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Question Number 157315 by amin96 last updated on 22/Oct/21

Answered by gsk2684 last updated on 22/Oct/21

$$\underset{t=5555}{\prod ^{55555}}{(-1)}^t$$$$={(-1)}^{5555}{(-1)}^{5556}...{(-1)}^{55555}$$$$=(-1)\left(1\right)(-1)....(-1)\left(oddnumberofterms\right)$$$$=1$$

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