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Express the limits in Exercises 1−8 as definite
1.
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- 3. Let f(x, y) = cos(x² + y²) - 1 x² + y² (a) Determine the domain of f. (b) Determine where f is a continuous function. Briefly explain your answer. (c) Determine if f has any removable discontinuities.arrow_forward3. Let z € R" be denoted by x = (₁, 2,...,n) and || x ||:= √√x² + x² + +x². Let f: RR be defined by f(x) =|| x ||. Using the € - 6 definition, show that f is continuous at all points.arrow_forwardVII. Let R be the shaded region below enclosed by the curves C₁ : 27(y − 2) = 2(x − 1)³, C₂: x=4+√√√4y - y² and C3 : 4y - x = 2. (-2,0) R (4,4) (6,2) (a) Set up a (sum of) definite integral(s) equal to the area of R using horizontal rectangles.arrow_forward
- Which of the following functions f: R → R is continuous at the point 0 € R? f(x) = f(x) = f(x) = f(x) = √√√x 0 { f(x) = x² L'x X +2 {X² if x ≥ 0 if x 0 if x 0 if x 0 Choose... Choose... Choose... Choose... Choose... (▶arrow_forward2. Let f(x) = sin(D + 1)x sin(4 – D)x . (i) By the help of the third order Maclaurin polynomial of f calculate the approximative value of the integral " f(x) dx . Estimate c0,5 the error. (ii) Calculate the exact value of the previous integral. (iii) Find the limits lim f(x)-ax? ,a = 4,6 . x4 2+(5+1)+6+(4+2)=20%arrow_forward18. Let f(x) be continuous on [1, 3] and f (1) = 4, f(3) = 20. Show using the intermediate value theorem that the equation f(x) = 5x has at least one solution in the interval (1, 3). (Hint: Consider the function g(x) = f(x)-5x.) %3D %3D %3Darrow_forward
- Let constant c > 0. Suppose that f is continuous on [ 1,c]. Use ONLY the Riemann sum definition of the definite integral to prove : If f satisfies –1< 4f(#) – 6 < 1 on [-1, c], then -(c+ 1) < /. (45(c) – 6 )d.r < - 6 ) dxarrow_forward7. Let (.) be the integral inner product on C[-1, 1]. That is, given f = f(x) and g = g(x), we have (f,g) = cos x are orthogonal in this f₁f(x)g(x)dx. Determine whether or not ƒ = f(x) = sin x and g = g(x) : space. Justify your answer. =arrow_forward4. Let f : R" → R be defined by f(x1, x2,... , Xn) = x1X2° ..· Xn on the cube [0, 1] × [0, 1] × ·.. x [0, 1] (i.e. for 0 < x1 < 1,0 < x2 < 1,...,0 < xn < 1). Evaluate 1 ,In) dx1 dx2 dan .. .. 1 Use your result to calculate X2, , Xn) dx1 dx2 dxn n=0 5. The average value favg of the function f : R? →R over the domain D is given 1 by the formula favg = iD // f(r, y) dA, where m(D) is the measure of the size of D (in general, this could be length, area, volume, etc.) Find the average value of the function f(x, y) = x sin (xy) on the square [0, T] × [0, 7].arrow_forward1. For I = (₁, ..., in) = (NU {0})", denote and |I| = i₁+··· + in X² = x²¹x²₂²...x²n in Xn A polynomial f: R → R is a function of the form f(x) = Σ αγχ Iarrow_forward= Define ƒ : [0,2] → R by f(x) = 2x - r² for 0 < x < 1 and f(x) (x-2)² for 1 < x < 2. Prove that f is integrable on [0,2] and find the integral of f over [0,2]. Don not use Theorem 5.10, but rather find the integral by methods similar to those used in the proof of Theorem 5.8.arrow_forwardⒸ Prove that f(x)= x² + 2x² is integraliśle of integrals. on [1,1]] using definitionarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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