ПРОБНИК ОГЭ 21 НОМЕР !!!

Question

ПРОБНИК ОГЭ 21 НОМЕР !!!

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Answer 1

(62*7ⁿ⁺²*35ⁿ) :(5ⁿ⁺³-5ⁿ)= (62*7ⁿ⁺²*5ⁿ*7ⁿ) :5ⁿ(5³-1)= (62*7²ⁿ⁺²) :(5³-1)=

(62*7²ⁿ⁺²) :124= 7²ⁿ⁺² :2