These answers correspond to the problems in Section 3.4. Since x+7 ≠ 0 x + 7 ≠ 0 for all x ∈[−1,2] x ∈ [− 1, 2] it follows that the function g, g, as a rational function, is continuous on the closed ...

J. J. Koliha, Mean, Meaner, and the Meanest Mean Value Theorem, The American Mathematical Monthly, Vol. 116, No. 4 (Apr., 2009), pp. 356-361 ...