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Let  F––(t)=2ti–−5j–+t2k––𝐹_(𝑡)=2𝑡𝑖_−5𝑗_+𝑡2𝑘_ and G––(t)=(1−t)i–+1tk––𝐺_(𝑡)=(1−𝑡)𝑖_+1𝑡𝑘_ where t∈R+𝑡∈𝑅+.

Question

Let
F(t)=2ti−5j+t²k
F(𝑡)=2𝑡𝑖−5𝑗_+𝑡²𝑘_
and
G(t)=(1−t)i+1tk
G(𝑡)=(1−𝑡)𝑖+1𝑡𝑘_
where
t∈ℝ⁺
t∈ℝ⁺.

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Solution

Break Down the Problem

  1. We have two vector functions F(t) \mathbf{F}(t) and G(t) \mathbf{G}(t) .
  2. The functions are defined as follows:
    • F(t)=2ti5j+t2k \mathbf{F}(t) = 2t \mathbf{i} - 5 \mathbf{j} + t^2 \mathbf{k}
    • G(t)=(1t)i+1tk \mathbf{G}(t) = (1-t) \mathbf{i} + 1t \mathbf{k}
  3. The goal is to analyze these vector functions, their relationship, or other properties as required.

Relevant Concepts

  1. Vector Functions: Each function describes a vector in terms of a parameter t t .
  2. Addition and Subtraction of Vectors: Understanding how to manipulate vector functions is crucial.
  3. Limits and Continuity: We need to consider the implications of t t being in R+ \mathbb{R}^+ (positive real numbers).

Analysis and Detail

  1. Expressing the Vectors:

    • F(t)=(2t,5,t2) \mathbf{F}(t) = (2t, -5, t^2) in coordinate form.
    • G(t)=(1t,0,t) \mathbf{G}(t) = (1-t, 0, t) in coordinate form.
  2. Finding Relationships:

    • We can set F(t) \mathbf{F}(t) equal to G(t) \mathbf{G}(t) to find common points, if any: (2t,5,t2)=(1t,0,t) (2t, -5, t^2) = (1-t, 0, t)
    • This gives us three equations, one for each component:
      1. 2t=1t 2t = 1 - t
      2. 5=0 -5 = 0 (which has no solution)
      3. t2=t t^2 = t

Verify and Summarize

  1. From the Equations:
    • The first equation 2t+t=1 2t + t = 1 leads to 3t=1 3t = 1 or t=13 t = \frac{1}{3} .
    • The second equation is a contradiction, indicating that there are no points where these vectors are equal.
    • The third equation t2=t t^2 = t gives t(t1)=0 t(t-1) = 0 , implying t=0 t = 0 or t=1 t = 1 . Since t t is restricted to positive reals, we take t=1 t = 1 .

Final Answer

Since F(t) \mathbf{F}(t) and G(t) \mathbf{G}(t) have no common points for tR+ t \in \mathbb{R}^+ , there are no intersections or equal points in the defined range. The first component yields one valid solution, but the second component shows a contradiction, indicating no equality exists for positive t t .

This problem has been solved

Similar Questions

Let  F––(t)=2ti–−5j–+t2k––𝐹_(𝑡)=2𝑡𝑖_−5𝑗_+𝑡2𝑘_ and G––(t)=(1−t)i–+1tk––𝐺_(𝑡)=(1−𝑡)𝑖_+1𝑡𝑘_ where t∈R+𝑡∈𝑅+.

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Fie functiile f, g : R −→ R, definite prin f (x) = x − 2, g(x) = 2 − x, ∀x ∈ R(a) Sa se calculeze (f ◦ g)(1)

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