| 4 n2 + 5 n −7 − 4n2 | 5 n − 7 | |||
an = | = | = | ||
| √4 n2 + 5 n −7 + 2 n | √4n2 +5n −7 + 2 n |
| 5 − 7n | ||
= | ||
| √ 4 + 5n − 7n2 + 2 |
| 5 − 0 | 5 | |||
lim an = | = | |||
| √ 4 + 0 − 0 + 2 | 4 |
| a2 − b2 | ||
a − b = | ||
| a + b |
| 5^2 | 52 |
| 2^{10} | 210 |
| a_2 | a2 |
| a_{25} | a25 |
| p{2} | √2 |
| p{81} | √81 |
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