10. Known quadratic function y=a? The image of x+bx+c is shown in the figure, and there are five conclusions as follows:

①ABC & gt； 0; ②b & lt； a+c； ③4a+2 b+ c & gt； 0; ④2c & lt； 3b； ⑤a+b & gt； M(am+b)(m is not a real number equal to 1)

The correct conclusion is ()

A.2 B.3 C.4 D.5

The image is inverted U-shaped, with the center line x= 1, and the X axis intersects with (-1, 0) and the corresponding (2,3).

I think it's completely on it.

Ok, let's talk about the solution.

③4a+2 b+ c & gt； 0, stop talking

④2c & lt； 3b, there is a midline x= 1, b=-2a. When x= 1, y = a-b+c

⑤a+b & gt； Can M(am+b)(m is not a real number equal to 1) be equivalent to am? +BM-(a+b)& lt； 0, delta = b of this? +4a(a+b)=4a？ -4a？ =0, that is, when m= 1, there are only real roots, which conflicts with the topic ... Me too? +bm-(a+b) This inverted U-shaped formula (A

This is the answer.