lekaje2375
10.12.2020 •
Mathematics
- 20 - TO-
-0.1 - 0.7
Solved
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Ответ:
?
Step-by-step explanation:
Ответ:
Step-by-step explanation:
For f(x) = (2x-5)/((x -2)(x +5)), the decomposition will be of the form ...
f(x) = A/(x -2) +B/(x +5)
The values of A and B can be found from ...
A = (x -2)f(x) evaluated at x=2
A = (2·2-5)/(2+5) = -1/7
__
B = (x +5)f(x) evaluated at x=-5
B = (2(-5) -5)/(-5-2) = -15/-7 = 15/7