Please prove in detail (Exercise 6.6.1):
Exercise 6.6.1. Let f a, bR be a differentiable function of one variable such that If,(x) 1 for a...
2. Let f: R R be a continuous function. Suppose that f is differentiable on R\{0} and that there exists an L e R such that lim,of,(z) = L. Prove that f is differentiable at 1-0 with f,(0) = L. (Hint: Use the definition of derivative and then use mean value theorem) 2. Let f: R R be a continuous function. Suppose that f is differentiable on R\{0} and that there exists an L e R such that lim,of,(z) =...
B ead 2a.y then... rove thut iF P is differentiable on Ca, b) and there is a constant m Such hat P'()m for ai xela,b)then there exists a censtant c Such that 29.4 Corollary. Let f be a differentiable function on (a, b) such that f'(z) = 0 for all Proof If f is not constant on (a, b), then there exist r1,2 such that a < 1<r2 <b and f(xi) ^ f(r2). By the Mean Value Theorem, for some...
Exercise 5.3.4: Let f: [a,b] → R be a continuous function. Let ce [a,b] be arbitrary. Define po the Prove that F is differentiable and that F'(x) = f(x) for all x € [a,b]. series on the
differentiable function and there exists 0 <A < 1 (6) Suppose that f : R" -> R" is a such that |f'(x)|< A, for all x E R". Prove that the function F(x)= x - f(x) maps R" one-to-one and onto R". (Suggestion: Use the Contraction Mapping Principle Why not use the Inverse Function Theorem?) differentiable function and there exists 0
4 Suppose f : (0,0) → (0,x), is a differentiable function satisfying f(a +b)-f(a)fb), for all a,b>0 Moreover, assume that f(0)1 (a) Prove that there exists λ (not necessarily positive) such that f(r) = e-Ar, for all r. Hint Find and solve a proper differential equation. (b) Suppose that X is a continuous random variable, with P(X>ab)-P(>a)P(X> b), for all a, b e (0, oo). Prove that X is exponentially distributed
Suppose f is a continuous and differentiable function on [0,1] and f(0)= f(1). Let a E (0, 1). Suppose Vr,y(0,1) IF f'(x) 0 and f'(y) ±0 THEN f'(x) af'(y) Show that there is exactly f(ax) and f'(x) 0 such that f(x) one Hint: Suppose f(x) is a continuous function on [0, 1] and f(0) x € (0, 1) such that f(x) = f(ax) f(1). Let a e (0,1), there exists an Suppose f is a continuous and differentiable function on...
Let f [a, b [a, b] such Exercise 28: R be continuous. Show that there exists x E : that 1 f(x)= f. 6-a Hint: Intermediate value theorem Let f [a, b [a, b] such Exercise 28: R be continuous. Show that there exists x E : that 1 f(x)= f. 6-a Hint: Intermediate value theorem
Let us verify the Mean Value Theorem with the function f(x) = VE on the interval (2,8). Solution. We have f is continuous on (2,8) f is differentiable on (2,8). f'(o) – f(8) – f(2) 8 - 2 We have f'(x) = The only value that satisfies the Mean Value Theorem is
Does the function satisfy the hypotheses of the Mean Value Theorem on the given interval? f(x) = In(x), (1,91 Yes, it does not matter if is continuous or differentiable, every function satisfies the Mean Value Theorem. Yes, f is continuous on [1, 9] and differentiable on (1,9). No, f is not continuous on 1, 9). No, f is continuous on [1, 9] but not differentiable on (1,9). There is not enough information to verify if this function satisfies the Mean...
Let U be an open subset of R. Let f: U C Rn → Rm. (a) Prove that f is continuously differentiable if and only if for each a є U, for each E > 0, there exists δ > 0 such that for each x E U, if IIx-all < δ, then llDf(x)-Df(a) ll < ε. (b) Let m n. Prove that if f is continuously differentiable, a E U, and Df (a) is invertible, then there exists δ...