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Автор - mentolM

Помогите, пожалуйста, решить :(

Ответ

Проверено экспертом

Автор - nafanya2014
Перед последней скобкой стоит множитель
 frac{2}{x+2}cdot(1+ frac{1}{x+1})= frac{2}{x+2}  cdot frac{x+2}{x+1} = frac{2}{x+1}
Далее, аналогично
 frac{3}{x+3}cdot(1+ frac{2}{x+1})= frac{3}{x+3}cdot frac{x+3}{x+1} = frac{3}{x+1}
и так далее
 frac{10}{x+10}cdot (1+frac{9}{x+1})= frac{10}{x+10}cdot frac{x+10}{x+1}= frac{10}{x+1}

Решаем уравнение
 frac{10}{x+1} =11
10=11(x+1)
10=11x+11
11x=-1
x=-1/11

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