# Limit of Sequence Problems

### Solutions

1Prove that the sequence has a limit of 2. Also, calculate the terms whose distance from 2 is less than 0.1.

2Prove that the sequence has a limit of 4 and calculate how many terms of the succession are not within (4 − 0.001, 4 + 0.001).

3Prove that the sequence has a limit of 1 and calculate how many terms of the succession are not within (1 − 0.001, 1 + 0.001).

4Prove that . Also, calculate the terms whose distance from the limit is less than 0.01.

5Prove that the sequence has a limit of +∞ and determine how many terms in the sequence are less than a million?

6Prove that the sequence a_{n}= −n^{2 } has a limit of −∞. Also, what term of the sequence produces values of less than −10,000?

## 1

Prove that the sequence has a limit of 2. Also, calculate the terms whose distance from 2 is less than 0.1.

From_{a41}_{ the distance to 2 is less than 0.1.}

_{ }

## 2

Prove that the sequence has a limit of 4 and calculate how many terms of the succession are not within (4 − 0.001, 4 + 0.001).

The first thousand terms of the sequence are out.

## 3

Prove that the sequence has a limit of 1 and calculate how many terms of the succession are not within (1 − 0.001, 1 + 0.001).

The first 54 terms are out.

## 4

Prove that . Also, calculate the terms whose distance from the limit is less than 0.01.

From a_{219} the distance to the limit is less than 0.01.

## 5

Prove that the sequence has a limit of +∞ and determine how many terms in the sequence are less than a million?

The 1,999 first terms of the sequence.

## 6

Prove that the sequence a_{n}= −n^{2 } has a limit of −∞. Also, what term of the sequence produces values of less than −10,000?

−1, −4, −9, −16, −25, −36, −49, ...

If N = 10,000, its square root is 100, therefore, ** a _{101}** will be less than −10,000.

a_{101}= −101^{2} = −10,201