Mathematics
Senior High
解説がややこしいのですが、解説の解説お願いします…
P(a≤ x ≤₁₂a) = √²² f(x)dx
= √1* 111 (2a-x\dx = 111 [2ax-x
a(¾¾a− a)–
1
•
3a2
1
3
3
2a
3a²
3a² 2
1
a
1
15
.2a.
a.
3a²
2 3a² 24
1
1 3
a
71
3a²
=
3a² 8
8
Answers
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