Statistics and Numerical Methods: Unit IV: Interpolation, numerical differentiation and numerical integration

Exercise 4.1 [Lagrange's Interpolation]

Solved Example Problems

Statistics and Numerical Methods : Unit - IV : Interpolation, numerical differentiation and numerical integration : Exercise 4.1 [Lagrange's Interpolation]

EXERCISE 4.1 [Lagrange's Interpolation]

 

Using Lagrange's interpolation formula, solve the problems below.

1. Find ƒ (0) given


 

2. Find f(x) given the table.



3. Find f(x), also find f (2).


 

4. Find y (1.50)


 

5. Find ƒ (2)


 [Ans. ƒ (2) = 19]

 

6. Find ƒ (6).


 [Ans. ƒ (6) = 294]

 

7. If log (300) = 2.4771, log (304) = 2.4829, log (305) = 2.4843, log (307) = 2.4871, find log (301).

[Ans. 2.4786]


 8. Find tan 33°.

 [Ans. tan 33° = 0.6494]

 


9. Find y (3.5)


 [Ans. y (3.5) = 1.5723]

 

10. Using Lagrange's formula find the value of x when f(x) = 15 from the given data.


 [Ans. 11.5]

 

11. Find the value of x corresponding to y = 100 from the table.


 [Ans. 8.656]

 

12. Find the value of x correct to one decimal place for which y = 7, given


 [Ans. 1.8572]

 

13. The following table gives the values of the probability integral

 corresponding to certain values of x. For what value of x in this integral is equal to 0.5.


 [Ans. 0.4769337]

 

14. Given:


find y (2).

[Ans. y (2) = 0 ]

 

15. Given:


find ƒ (4).

 

16. Find y' (1), if


 [Ans. y' (1)=-3]

 

Statistics and Numerical Methods: Unit IV: Interpolation, numerical differentiation and numerical integration : Tag: : Solved Example Problems - Exercise 4.1 [Lagrange's Interpolation]