Mathematics
Senior High
Solved
緑の式変形が分かりません💦
教えて頂きたいです🙇🏻♀️
図より,求める面積は
1-m
1+m
S(m) = f (x|1−x|- mx)dx + ['*mm (mx − x|1 − x\)dx
0
1-m
1-m
1+m
= {x (1-x)= mx} dx + ['_{mx-x(1-x)} dx + ['*" {mx+x(1−x)}dx
0
1
1+m
3
1-m 2
1
3
1+m
x
+
·x+
2
3
2
1-m
1+m
1-m
.3
x
1-m
+
+
2
Jo
3 2
- m
3
2
= (1–m)³ +
1
X
+ —— (1+m)³
=-—-—-—(m³ −9m² + 3m −1)
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赤線部のまとめを忘れてましたm(_ _)m