It is known that the image of quadratic function f (x) = ax ^ 2 + BX + C is symmetric with respect to the line x + 1 = 0, the maximum value is 4, and the intercept on the Y axis is - 1 Find the values of a, B and C I think this problem can be directly solved with the formula after knowing the vertex coordinates, But when I checked it, I found it was wrong And how to calculate all because of the symbol problem and vertex coordinates do not match My answer is a=2 c=5 a=-1 Answer in one day!

It is known that the image of quadratic function f (x) = ax ^ 2 + BX + C is symmetric with respect to the line x + 1 = 0, the maximum value is 4, and the intercept on the Y axis is - 1 Find the values of a, B and C I think this problem can be directly solved with the formula after knowing the vertex coordinates, But when I checked it, I found it was wrong And how to calculate all because of the symbol problem and vertex coordinates do not match My answer is a=2 c=5 a=-1 Answer in one day!

It is known that the image of quadratic function f (x) = ax ^ 2 + BX + C is symmetric with respect to the line x + 1 = 0, the maximum value is 4, and the intercept on the Y axis is - 1
Find the values of a, B and C
The analytic expression of the function is y = ax ^ 2 + BX + C
(1) Taking the line x = - 1 as the symmetry axis, we can deduce - B / (2a) = - 1
(2) The function has a maximum value of 4, and a is obtained

50: Ax + by + 12 = 0, its X-axis intercept is 3, Y: axis intercept is - 4. Find a and B. see, please come back!

Its x-intercept is 3 y: its x-intercept is - 4
The linear equation passes through the point (3,0) (0, - 4)
The solution of 3A + 12 = 0 is a = - 4
-4b + 12 = 0, B = 3
So the linear equation is - 4x + 3Y + 12 = 0

Given that the intercept of AX + by + C = 0 on the x-axis is greater than that on the y-axis, then a, B and C should satisfy the condition ()
A. A＞BB. A＜BC. CA+CB＞0D. CA−CB＜0

∵ the intercept of AX + by + C = 0 on the x-axis is greater than that on the y-axis, that is − Ca ＞ − CB, ∵ Ca − CB ＜ 0

If ax + by + C = 0 and the intercept on X and Y axes are 2 and 1 respectively, then a: B: C =?

When x = 0, y (0) = - C / B, when y = 0, X (0) = - C / A
So x (0) / Y (0) = 2:1, a: B: C = 1:2: n (n is not 0)