Here's a question from my review sheet before midterms. We're learning about interpolation; not sure how to apply it to this.

Find the cubic polynomial f such that f(0) = 0, f(1) = 2, f''(0) = 0, f'(1) = 4.

Thanks.

Printable View

- Mar 1st 2009, 03:26 PMNiotsueqNumerical Analysis
Here's a question from my review sheet before midterms. We're learning about interpolation; not sure how to apply it to this.

Find the cubic polynomial f such that f(0) = 0, f(1) = 2, f''(0) = 0, f'(1) = 4.

Thanks.

- Mar 1st 2009, 03:45 PMarpitagarwal82
f(0) = 0, f(1) = 2, f''(0) = 0, f'(1) = 4.

let the polynomial be

Now

f(0) = 0

so d = 0

so polynomial reduces to

f(1) = 2,

a + b + c = 2

f''(0) = 0,

so b = 0

f'(1) = 4.

so 3a + 2b = 4

solving we get

a = 4/3

b = 0

c = 2/3

d= 0

so polynomial is

- Mar 1st 2009, 03:50 PMNiotsueq
Is there a way to solve it using polynomial interpolation or something? I started out doing it the way you did it but, figured it was wrong since we were supposed to be learning about interpolation. I'll try to solve the other questions using that method for now. Thanks.