题已知二次函数f(x)=ax2+bx+c(a0)的图像与x轴有两个不同的公共点,若f(c)=0,且0xc时,f(x)0.(1)试比较1a与c的大小;(2)求实数b的取值范围;(3)当c1,t0时,求证:t+a2+t+b1+ct0.这是一道常见的高考模拟试题,经常出现在全国各地的高考模拟试题中,解决本题的关键是要抓住以下两 The image of the known quadratic function f(x)=ax2+bx+c(a0) has two different common points with the x axis. If f(c)=0, and 0xc, f(x)0. (1) Compare the sizes of 1a and c; (2) Find the range of real numbers b; (3) When c1, t0, verify: t+a2+t+b1+ct0. This is a common college entrance examination simulation. Question questions often appear in college entrance examination simulation test questions across the country. The key to solving this problem is to seize the following two