Let f(x)=√(x−1). Find a value of c∈[2,5] so that f(c) is the average value of f(x) on the interval [2,5].

·[ 1 (2²) e Lf(s) = = f(x) e™** dr

Determine the interval(s) at which f(x) : 8. + 10x + 6x +4 is concave down. a) O (-1, 0) b) O(-0, 5) c) O (-00, -1), (5, 0) d) O(-1,5) e) O (-00, -5), (1, 0)