Question

log по основанию x+1 от (x^2 - 6x - 7) = 1

Answer 1

$log_{x+1}(x^2-6x-7) = 1 \ x+1 = x^2-6x-7, x textgreater -1 \ x^2-7x-8 = 0, x textgreater -1 \ x=-1, x=8, x textgreater -1 \ x=8$

Answer 2

....................... ответ 8