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attashe74 [19]
3 years ago
11

Let f (x) = (1 − x)−1 and x0 = 0.

Mathematics
1 answer:
Papessa [141]3 years ago
5 0

Answer:

n = 7

Step-by-step explanation:

Recalling Taylor nth polynimial, we have,

Pₙ (x) = f (a) f ¹ (a) (x −a) + f ¹¹ (a) (x −a)²/2 + f ¹¹¹ (a) (x −a)³/3x2 + .......+ f ⁽ⁿ⁾ (a) (x-a)ⁿ / n (n - 1) (n - 2) .......3x2

Therefore,

If f(x) = ( 1 - x) ⁻¹ ,

Then the Lagrange form of the remainder hold which sates that,

( 1 - x) ⁻¹ - Pₙ (x) = f ⁿ⁺¹ (c) x ⁿ⁺¹ / (n + 1) !

Noting that,

where C is between 0 and x,

Hence therefore, the error is bounded by,

/ (0.5) ⁿ⁺¹ ( 1 - x) ⁻¹ ⁽⁰⁵⁾  ÷   (n + 1) !/ ≤ 10⁻⁶

These then equates to the fact that, that inequality first equates to 7.

Therefore,  n = 7.

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