If the image of the function y = a ^ X - (B + 1) (a > 0, a ≠ 1) passes through the first, third and fourth quadrants, there must be () AA > 1 and b > 0; B0 < a < 1 and B < 0; C0 < a < 1 and b > 0; Da > 1 and b > 1

If the image of the function y = a ^ X - (B + 1) (a > 0, a ≠ 1) passes through the first, third and fourth quadrants, there must be () AA > 1 and b > 0; B0 < a < 1 and B < 0; C0 < a < 1 and b > 0; Da > 1 and b > 1

If image a is "丿", then a > 1 (0

If the image of the function y = ax - (B + 1) (a > 0 and a ≠ 1) passes through the first, third and fourth quadrants, then there must be ()
A. 0 < a < 1 and B < 0b. A > 1 and b > 0C. 0 < a < 1 and b > 0d. A > 1 and b > 1

According to the image and properties of exponential function, if the image of function y = ax - (B + 1) (a > 0 and a ≠ 1) passes through the first, third and fourth quadrants, then the function is an increasing function, 〈 a > 1, and f (0) ＜ 0, that is, f (0) = 1 - (B + 1) = - B ＜ 0, and the solution is B ＞ 0

It is known that the image of inverse scale function y = K / X passes through the point (- 1,2), and the line y = x + B passes through the first three or four quadrants~
1. Find the analytic expression of inverse proportion function
2. If there is only one common point between the image of the straight line y = x + B and the inverse scale function y = K / x, the value of B is obtained
Mainly the second question!

(1) Because the image of y = K / X passes through the point (- - 1,2)
SO 2 = k * (-- 1), k = -- 2
So the analytic expression of the inverse proportion function is y = -- 2x
(2) Because the line y = x + B passes through one, three, four quadrants
So B is less than 0
Y is eliminated by y = x + B and y = -- 2 / X
x+b=--2/x
x^+bx+2=0
Because there is only one common point between the line y = x + B and the inverse scale function y = -- 2x
So the discriminant B ^ 2 -- 8 = 0
B = -- 2 root sign 2 (because B is less than 0, 2 root sign 2 should be omitted)