6.G i v e ngÝxÞ = x 3 ?2x+2 if x ²? 2 x 2 +ax+bi f ?2 < x < 1 4x 4 ?3x 3 ?5x+2 if 1 ² x , find values for a and b so that the function is continuous for all x. (4 Points)
Question
6.G i v e ngÝxÞ = x 3 ?2x+2 if x ²? 2 x 2 +ax+bi f ?2 < x < 1 4x 4 ?3x 3 ?5x+2 if 1 ² x , find values for a and b so that the function is continuous for all x. (4 Points)
Solution
The function g(x) is continuous for all x if and only if the two piecewise functions are equal at the point where they meet, which is x = 1.
So, we need to solve the following equations:
- x³ - 2x + 2 = x² + ax + b when x = 1
- 4x⁴ - 3x³ - 5x + 2 = x² + ax + b when x = 1
Substituting x = 1 into the equations, we get:
- 1³ - 21 + 2 = 1² + a1 + b
- 41⁴ - 31³ - 51 + 2 = 1² + a1 + b
Solving these equations, we get:
- 1 - 2 + 2 = 1 + a + b
- 4 - 3 - 5 + 2 = 1 + a + b
Solving these equations, we get:
- a + b = 1
- a + b = -2
These two equations are contradictory, so there are no values for a and b that can make the function continuous for all x.
Similar Questions
Calculus AB Assignment Continuity Problems 4. Suppose fÝxÞ = x?1 x 4 ?1 if x ² 2 |x?3| x?3 if 2 < x . Identify any points of discontinuity, and determine (giving reasons) if they are removable, infinite (essential), or jump discontinuities. (6 Points) 5. Find all the constants a that make the function fÝxÞ = 3Ýa?xÞ if x < 3 a 2 ?x 2 if x ³ 3 continuous for all x. (2 Points) 6.G i v e ngÝxÞ = x 3 ?2x+2 if x ²? 2 x 2 +ax+bi f ?2 < x < 1 4x 4 ?3x 3 ?5x+2 if 1 ² x , find values for a and b so that the function is continuous for all x. (4 Points)
Find all the constants a that make the function fÝxÞ = 3Ýa?xÞ if x < 3 a 2 ?x 2 if x ³ 3 continuous for all x. (2 Points)
If the following function is continuous, then what is the value of a?ℎ(𝑡)={2𝑡+𝑏𝑖𝑓 𝑡<02cos(𝑡)−3𝑖𝑓 0≤𝑡≤𝜋2𝑎sin(𝑡)+5𝑏𝑖𝑓 𝑡>𝜋2h(t)= ⎩⎪⎨⎪⎧ 2t+b2cos(t)−3asin(t)+5b if t<0if 0≤t≤ 2π if t> 2π A.1B.ℎ(𝑡)={2𝑡+𝑏𝑖𝑓 𝑡<02cos(𝑡)−3𝑖𝑓 0≤𝑡≤𝜋2𝑎sin(𝑡)+5𝑏𝑖𝑓 𝑡>𝜋2h(t)= ⎩⎪⎨⎪⎧ 2t+b2cos(t)−3asin(t)+5b if t<0if 0≤t≤ 2π if t> 2π C.4D.0E.2
If the following function is continuous, then what is the value of b?𝑔(𝑡)={2𝑡2+2𝑡−24𝑡−3𝑖𝑓 𝑡≠3𝑏𝑖𝑓 𝑡=3g(t)={ t−32t 2 +2t−24 b if t≠3if t=3 A.14B.3C.7D.None of theseE.0
Let f (x) be defined by: f (x) = 2x /(3 + x) , x ≤ −2 k(x − 2), −2 < x < 4 2x − 6, x ≥ 4 Which of the following values of k would make f (x) continuous on R? a) k = 2 (b) k = 1 (c) There is no such value for k. (d) k = −1
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.