Решите log2 (x+1)+2log4 (x+5) = 8log1/2 8 - вопрос №4915174212458128 от kovdalg 16.08.2020 06:52

Question

Алгебра: Решите log2 (x+1)+2log4 (x+5) = 8log1/2 8

kovdalg · Answer

Log2 (x+1) + 2log4 (x+5) = 8log1/2 8 Log2 (x+1) + 2/2log2 (X+5) = -8log2 8 Log2 (x+1) + log2 (x+5) = -8 * 3 Log2 (x+1)(x+5) = -24 Log2 x^2+5x+x+5= -24 X^2+6x+5 = 0 ; 0 не равно 1 D=36-20=16=4^2 X1,2=1;5 1 не разрешено !...