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Taylor/MacLaurin Poly Practice

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

A 4th order Taylor polynomial is written for a function with a range of y >0 and all non-zero derivatives, such as f(x) = e2x. This is just to make sure there are no missing terms in the Taylor polynomial. How many terms does the 4th order Taylor polynomial have?

a)

2

b)

4

c)

5

d)

infinitely many

2.

A 4th order Taylor polynomial is written for a function with a range of y > 0 and all non-zero derivatives. Assuming the terms are listed in ascending order of degree, which term contains the third derivative of the function?

a)

the 2nd term

b)

the third term

c)

the fourth term

d)

the last term

3.

h(x) is a continuous function with continuous derivatives. Using the values given in the table what is the 2nd term of a Taylor polynomial centered at x = 2?

a)

4483⋅12!(x−2)2\frac{448}{3}\cdot\frac{1}{2!}\left(x-2\right)^2

b)

128(x−2)128\left(x-2\right)

c)

128(x − 2)2128\left(x\ -\ 2\right)^2

d)

1282!(x−2)2\frac{128}{2!}\left(x-2\right)^2

4.

 2 +3(x−3) + 10(x−3)2 +π(x − 3)32\ +\sqrt{3}\left(x-3\right)\ +\ 10\left(x-3\right)^2\ +\pi\left(x\ -\ 3\right)^3  is a Taylor polynomial for g(x) centered at 3.  Which term contains g"(3) as part of its coefficient ?

a)

 3(x−3)\sqrt{3}\left(x-3\right)  

b)

 10(x−3)210\left(x-3\right)^2  

c)

 π(x−3)3\pi\left(x-3\right)^3  

5.

 2 +3(x−3) + 10(x−3)2 +π(x − 3)32\ +\sqrt{3}\left(x-3\right)\ +\ 10\left(x-3\right)^2\ +\pi\left(x\ -\ 3\right)^3  is a Taylor polynomial for g(x) centered at 3.  Which equation is the correct set-up to find the value of g"(3)?

a)

 g"(3) = 3g"\left(3\right)\ =\ \sqrt{3}  

b)

 g"(3) = 10g"\left(3\right)\ =\ 10  

c)

 g"(3)2!= 10\frac{g"\left(3\right)}{2!}=\ 10  

d)

 g"(3)3!=π\frac{g"\left(3\right)}{3!}=\pi  

6.

 T4(x) = 2 − 2(x − a) +5(x−a)2−π2(x−a)3+(x−a)4T_4\left(x\right)\ =\ 2\ -\ 2\left(x\ -\ a\right)\ +\sqrt{5}\left(x-a\right)^2-\frac{\pi}{2}\left(x-a\right)^3+\left(x-a\right)^4  is a Taylor polynomial for a function, f(x), centered at a.  What is f(a)?

a)

2

b)

-2

c)

2a

d)

cannot be dertermined

7.

 T4(x) = 2 − 2(x − a) +5(x−a)2−π2(x−a)3+(x−a)4T_4\left(x\right)\ =\ 2\ -\ 2\left(x\ -\ a\right)\ +\sqrt{5}\left(x-a\right)^2-\frac{\pi}{2}\left(x-a\right)^3+\left(x-a\right)^4  is a Taylor polynomial for a function, f(x) centered at a.  What is f '''(a) ?

a)

 252\sqrt{5}  

b)

 −π2\frac{-\pi}{2}  

c)

 −3π-3\pi  

d)

24

8.

given:  f(0) = 0, f′(0) = 1, f"(0) = −1, f′′′(0) = 2f\left(0\right)\ =\ 0,\ f'\left(0\right)\ =\ 1,\ f"\left(0\right)\ =\ -1,\ f'''\left(0\right)\ =\ 2 A polynomial using these values can be called both Taylor and MacLaurin .

a)

True

b)

False, only MacLaurin

c)

False, only Taylor

d)

False, this polynomial is called Bob

9.

given:  f(0) = 0, f′(0) = 1, f"(0) = −1, f′′′(0) = 2f\left(0\right)\ =\ 0,\ f'\left(0\right)\ =\ 1,\ f"\left(0\right)\ =\ -1,\ f'''\left(0\right)\ =\ 2 Which of these is the 3rd order Taylor polynomial for f(x), centered at x = 0.  

a)

 x − 12x2+13x3x\ -\ \frac{1}{2}x^2+\frac{1}{3}x^3  

b)

 x−x2+2x3x-x^2+2x^3  

c)

none of these

10.

This is true:  ex=1+x+x22!+x33!+x44!+...e^x=1+x+\frac{x^2}{2!}+\frac{x^{3^{ }}}{3!}+\frac{x^4}{4!}+...  

Is this true, too?  e2=1 + 2+222!+233!+244!...e^2=1\ +\ 2+\frac{2^2}{2!}+\frac{2^{3^{ }}}{3!}+\frac{2^4}{4!}...  

a)

yes, this is why the Taylor stuff is so important

b)

no, what a rediculus idea

c)

yes, but only on Tuesdays

d)

I don't know, but isn't cheese a beautiful thing?