Решить уравнение (366-375). 366. 1) log, (5x - 1) = 2;
4) log, (x + 3) = 2;
2) log, (3x + 1) = 2;
5) lg(3x - 1)= 0;
3) log, (2x - 3)=1;
6) lg (2 - 5x)= 1.
367. 1) log, (5x + 3) = log, (7x + 5);
2) log, (3x - 1) = log, (6x +8).
2; ;
2
368. 1) log2
= log, x,
i=182;
r-1
2) logi
= log1 x;
4) lg =
2
I-2
369. 1) log, (x2 - x)= 1;
4) log, (x2 + 2x - 4) = 2;
2) log, (x2 + 3x) = 2;
5) log. (x2 + 3x - 6)=-2;
3) Ig *+8
r-1
1-4-1gx.
10
log, 7-2
3
3) logg (x2 - 4x - 2) = 1; 6) log, (rº- 5x +33)=-3.
370. 1) log, (x - 5) + log, (x + 2) = 3; 3) Ig (x + V3 )+ Ig(x - V3 ) = 0;
2) log, (x - 2) + log, (x + 6) = 2; 4) lg (x - 1)+Ig (x + 1) = 0;
371. 1) lg (x - 1)-Ig (2x - 11)=lg 2;
2) lg(3x - 1) - lg (x + 5) = 1g 5;
3) log, (2x2 - 7x+6) - log, (x - 2) = log, x;
4) log, (x3 - x) - log, * = log, 3.
16с^2-25d^2 = (4c - 5d)(4c + 5d);
b^2-49a^2 = (b - 7a)(b + 7a);
144a^2b^2-289 = (12ab - 17)(12ab + 17);
c^2-100b^2 = (c - 10b)(c + 10b);
a^2b^2c^2-225 = (abc - 15)(abc + 15);
49a^2c^2-196 = 49•(a^2c^2 - 4) = 49•(ac - 2)(ac + 2);
x^8-y^8 = (x^4 - y^4)(x^4 + y^4) = (x^2 - y^2)(x^2 + y^2)(x^4 + y^4) = (x - y)(x + y)(x^2 + y^2)(x^4 + y^4);
256-81a^4 = (16 - 9a^2)(16 + 9a^2) = (4 - 3a)(4 + 3a)(16 + 9a^2);
625-c^4 = (25 - c^2)(25 + c^2) = (5 - c)(5 + c)(25 + c^2);
Если нет описки в условии, то
29d^2c^2x^2-196 = (√29dcx - 14)(√29dcx + 14);
144a^2-361b^2 = (12a - 19b)(12a + 19b);
36x^2y^2-121 = (6xy - 11)(6xy + 11);
m^2n^2-64 = (mn - 8)(mn + 8);