Let f be a function defined as follows:
1 ?:Q−{0}→R, ?(?)=1− .
?
Determine the set ?(?)
?h??? ????h????????? Q ??????? ?={?: ?=?,
1
Write down the set ?(?) by listing the elements as well as in the descriptive form
?∈Z−{0}}
Let f be a function defined as follows: 1 ?:Q−{0}→R, ?(?)=1− . ? Determine the set...
I. Let f : R → R be defined by f(x)-x2 +1. Determine the following (with minimal explanation): (a) f(I-1,2]) 1(I-1,2 (c) f(f3,4,5) (d) f1(3,4,5)) (e) Is 3 € f(Q)? (f) Is 3 є f-1 (Q)? (g) Does the function f1 exist? If so describe it (h) Find three sets, A R such that f(A)-[5, 17]
Let f : [0,∞) → R be the function defined by f ( x ) = 2 ⌊ x ⌋ − x? where x? = x − ⌊x⌋ is the decimal part of x. Prove that f is injective. Let f: 0,00) + R be the function defined by f(3) = 212) where ã = x — [x] is the decimal part of x. Prove that f is injective.
- Let f be the function from R to R defined by f(x)=x2.Find a) f−1({1}). b) f−1({x | 0 < x < 1} c) f−1({x|x>c) f−1({x|x>4}). -Show that the function f (x) = e x from the set of real numbers to the set of real numbers is not invertible but if the codomain is restricted to the set of positive real numbers, the resulting function is invertible.
5. Let be the function defined by f(x) = -1 3 1.5 if r <0 if 0<x<2 if 3 < r <5 Find the Lebesgue integral of f over (-10,10).
34.3 Let f be defined as follows: f(t) = 0 for t < 0; f(t) = t for 0 <t < 1; f(t) = 4 for t > 1. (a) Determine the function F(x) = $* f(t) dt. (b) Sketch F. Where is F continuous? (c) Where is F differentiable? Calculate F' at the points of differentiability.
Fix an integer N>1, and consider the function f:[0,1]R defined as follows: if XE[0,1] and there is an integer n with 1<n<N such that nxez, choose n with this property as small as possible, and set f(x) := 1/n^2; otherwise set f(x):=0. Show that f is 0 integrable, and S f.
Consider the three-dimensional subspace of function space defined by the span of 1, r, and a2 the first three orthogonal polynomials on -1,1. Let f(x) 21, and consider the subset G-{g(z) | 〈f,g〉 0), the set of functions orthogonal to f using the L inner product on, (This can be thought of as the plane normal to f(x) in the three-dimensional function space.) Let h(z) 2-1. Find the function g(x) є G in the plane which is closest to h(x)....
Let S the set of all points x+0 of RAn. Suppose that r=1x11 and be f a vector field defined in S by the equation f(x)=r^px Being p a real constant. Find a potencial function for f in S Let S the set of all points x+0 of RAn. Suppose that r=1x11 and be f a vector field defined in S by the equation f(x)=r^px Being p a real constant. Find a potencial function for f in S
= Q 6. Let f: {0,1} + {0,1} be a function given by f(0) = 0 = f(1). Find two (total) functions g: {0,1} +{0,1} and h: {0,1} +{0,1} such that fog #gof and foh= hof. Write out f and your chosen functions g and h in table form, using a single table. Only the table is required as the answer.
9. La ste) defined as follows 9. Let f(x) defined as follows: f(x) = 0 if x < -1 = 2(x + 1)/27 if - 1<x<2 = 2/9 if 2 < x < 5 = 0 otherwise. Find F(u) = f(x)dx, where u E R.