f(x)−f(5) | (3/x2)−(3/52) | |||
f'(5) = limx→5 | = limx→5 | = | ||
x−5 | x−5 |
| ||||||||
limx→5 | = | |||||||
x−5 |
3(25−x2) | ||
limx→5 | = | |
25x2(x−5) |
−3(x2−25) | ||
limx→5 | = | |
25x2(x−5) |
−3(x−5)(x+5) | ||
limx→5 | = | |
25x2(x−5) |
−3(x+5) | −3*10 | 3*2 | 6 | |||||
limx→5 | = | = − | = − | |||||
25x2 | 25*25 | 5*25 | 125 |
5^2 | 52 |
2^{10} | 210 |
a_2 | a2 |
a_{25} | a25 |
p{2} | √2 |
p{81} | √81 |
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