Nếu đặt t = x+1, phương trình trở thành log2(t)+1 = log2(3(t-1)-1) = log2(3t-4).

Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, ... 1. 3. ) c) log5(81). 21. (8 pts.) Solve: log2(x2 − 3x − 6) − log2(x) = 1. 22. (8 pts.) Arrange the following numbers in order from smallest to largest ... Solution For The sum of all the roots of the equation log2​(x−1)+log2​(x+2)−log2​(3x−1)=log2​4. When x = 667, log(3x-1) - log(2) = 3 becomes log(3*667-1) - log(2) = 3 which becomes 3 = 3. this confirms the solution is correct. your solution is that x = log3(x + 3)2 = log3(10x + 6). (x + 3)2 = 10x + 6 x2 + 6x + 9 − 10x − 6=0 x2 − 4x +3=0. (x − 3)(x − 1) = 0 x = 3 x = 1. Question 21(e) log2(x + 1) + log8(x +1)=4. Nov 17, 2014 ... Check: If x = 3, then log2[(3 + 1)4] = 4 log2(4) = 4 ∙ 2 = 8, so 3 is a solution to the original equation. Exercises 2–4 (6 minutes). Students ... The base is 2, and the exponent, or logarithm, is -8. log2. 1. 256 = -8. Example 3. Evaluate the expression log3. 1. 1 Log2. 2 x = log₂ (5-4) хов. · Lage 3 = Log₂ (75-4). Λ x = loga (ty -4). У ... | x − 1 1 = 4. V. 2) x-1=4. L x = 5. 1x+3=0 x+3=0 x=-3 x-1=-4. 3)-2x-31 = 5. -2x ... ... x+x+2x²-x+4 by 3+1. 0. -RIN. Page 3. 16. (a) The equation 1228-23x2-3x+20 has a solution x = 2. Find all other solutions. (b) Solve for x, the equation 12x+8x2- ... log2 (x-1)+ log2 (x+3)=3 log2 ((x-1)(x+3)) = 3 (x-1)(x+3) = 2^3 x^2+3x-x-3 = 8 x^2+2x-3 = 8 x^2+2x-11 = 0 applying the "quadratic formula" we get: x = {2.46, - ...