1.
Let f(x)={x+1,0≤x≤12x2−6x+6,1<x≤2f(x)=\begin{cases} x+1, & 0 \le x \le 1 \\ 2x^2-6x+6, & 1 < x \le 2 \end{cases} and g(t)=∫t−1tf(x) dxg(t)=\int_{t-1}^{t} f(x)\,dx for t∈[1,2]t\in[1,2]. Which of the following hold(s) good?