41D Найдите корень уравнения `*`(`^`(`+`(x, 7), 7)) = 1 

Решение 

`and`(`and`(`*`(`^`(`+`(x, 7), 7)) = 1 implies `+`(x, 7) = 1, `+`(x, 7) = 1 implies `*`(`^`(`+`(x, 7), 7)) = 1) implies x = -6, x = -6 implies `and`(`*`(`^`(`+`(x, 7), 7)) = 1 implies `+`(x, 7) = 1, `... 

Ответ 

-6