A * b = 3 / A + 4 / B, given 4 * b = 4, then what is B equal to

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• 1. In the binomial expansion of (x ^ 2 + 1 / ax) ^ 6, the coefficient of x ^ 2 is 5 / 2, then a = need to answer the process in detail
• 2. We know that 7 ^ a = 5,49 ^ A + B = 81,7 ^ C = 35,7 ^ D = 63, and prove that B + C = D
• 3. Given that x = 5 is the solution of the equation AX-8 = 20 + a about X, find a The sum of two numbers B is 100 and the difference is 50
• 4. Given that x = 5 is the solution of the equation AX-8 = 20 + A, then a=______ ．
• 5. (x △ 5-1) - y = 6 x.y. how much is it? Can this be solved?
• 6. In the (X-2) ^ 10 expansion, the sum of coefficients of all terms is equal to
• 7. Baidu has the resolution of this problem, I can't understand it Let α ∈ (0, half π), the equation x & # 178; sin α + Y & # 178; Cos α = 1 denote the ellipse with focus on the y-axis, then the value range of α is the most detailed solution to this problem
• 8. 1. Given that cos (π / 3 + α) = - 3 / 5, sin (2 π / 3 - β) = 3 / 15, and 0 ＜α＜π / 2 ＜β＜π, the value of COS (β - α) can be obtained 2. Given sin α + sin β + sin γ = 0, cos α + cos β + cos γ = 0, the value of COS (β - γ) can be obtained There is no connection between the above two questions. You can answer one of them!
• 9. Let f (x) = a ^ x + B (a > 0) (a is not equal to 1) g (x) = 2x ^ 2-5x-k. if f (x) > m is r-constant for X, then f (x) > m is r-constant The range of M is 1) Find the value of A.B (2) When the two zeros of G (x) are respectively within (0,1) and (1,2), the value range of the real number k is obtained (3) Let H (x) = f (x) x > 0, H = g (x) = g (x) X
• 10. Given that 0 is less than X and less than or equal to 1 / 4, find the maximum value of the function f (x) = (x2-2x + 2) / x?
• 11. Find the coefficient of x ^ 2 term in (x ^ 2 + X-2) ^ 6 expansion
• 12. Given the equation x ^ 2 + 3x-2 = 0, then the coefficient of quadratic term is 1, and the two equations which are two times of the known equation are?
• 13. In the expansion of (x + 1) 3 + (x + 1) 4 + (x + 1) 5 + (x + 1) 6 + (x + 1) 7, the coefficient of X4 is? (the following numbers are all to the power.)
• 14. Find the coefficient of 1 / x ^ 6 in (1 + 2 / x ^ 2) ^ 5 expansion
• 15. The minimum value of function f (x) = 6 / 2 ^ x + 3 ^ x on [- 1,2]? A, 36 / 5 B 6 C 3 D 6 / 13 Tell me why
• 16. |X-Y | = under the root sign (x + y) twice + () The answer is - 4xy, who can tell me,
• 17. Given the cubic of X + twice of X + X + 1 = 0, find the value of twice of 1 + X + X + thrice of X + --- + 2012 times of X
• 18. Please write a quadratic trinomial about X so that the coefficient of the quadratic term is - 3, then the quadratic trinomial is ()
• 19. Write a quadratic trinomial about x such that the coefficient of its quadratic term is - 1 / 2
• 20. If the coefficient of the quadratic trinomial of X is - 5, write this polynomial