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Автор - jmorik

Помогите решить срочно нужно
( frac{1}{7} ^{ - 8}) times ( frac{1}{7}  ^{7})

Ответ

Автор - zinaidazina

(frac{1}{7})^{-8}* (frac{1}{7})^{7}= (frac{7}{1})^{8}* (frac{1}{7})^{7}=

=frac{7^8*1^7}{1^8*7^7}=frac{7^8*1}{1*7^7}=frac{7^8}{7^7}=7^{8-7}=7^1=7

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