4ç« ã®演習å•Â題(全å•Â)
4ç« ã®演習å•Â題(全å•Â)
4ç« ã®演習å•Â題(全å•Â)
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n<br />
n<br />
1 1<br />
P ( − x) = C − x + 1 −x − 1 = C − x + 1 −x<br />
−1<br />
2 k n−k 2<br />
k<br />
( ) (( ) ) (( ) ) ( ) (( ) ) (( ) )<br />
n n n k n n k<br />
2 k= 0 2 k=<br />
0<br />
n<br />
n n<br />
1 ( −1)<br />
= ∑ − − − + = ∑ − +<br />
2 2<br />
2 k<br />
n−k<br />
−<br />
2<br />
( C ) ( 1) ( x 1 ) ( 1) ( x 1) ( C ) ( x 1) ( x 1)<br />
n n k n n k<br />
k = 0 k = 0<br />
n<br />
= ( −1) P ( x)<br />
n<br />
∑<br />
∑<br />
k n k k n−k<br />
n <br />
n−k<br />
<br />
<br />
⎛ ⎞ ⎛ ⎞<br />
′<br />
x x dx x x dx<br />
⎝ ⎠ ⎝ ⎠<br />
1 n<br />
1 n−1<br />
d 2 n k d 2 n k<br />
∫⎜ ( − 1) ( 1)<br />
n ⎟ =<br />
n−1<br />
dx<br />
∫⎜ − ⎟<br />
dx<br />
−1 −1<br />
n−1 1 1 n−1 1 n−1<br />
k 2 n 2 n k−1 2 n<br />
( 1) ( 1) ( 1)<br />
n−1 n 1 n 1<br />
dx<br />
⎥<br />
− −<br />
dx dx<br />
−1<br />
−1 −1<br />
⎡ d ⎤ ⎛ d ⎞ ⎛ d ⎞ k−1<br />
= ⎢x x − − ⎜ x − ⎟kx dx=−k ⎜ x − ⎟<br />
⎣ ⎦ ⎝ ⎠ ⎝ ⎠<br />
∫ ∫ x dx<br />
<br />
[ ](x 2 1) n-1 <br />
<br />
<br />
<br />
x1x+1<br />
<br />
<br />
⎛ d<br />
x<br />
⎞<br />
xdx k<br />
⎛ d<br />
x<br />
⎞<br />
x<br />
1<br />
dx<br />
⎝ ⎠ ⎝ ⎠<br />
1 n<br />
1 n−1<br />
2 n k 2 n k−<br />
∫⎜ ( − 1) ( 1)<br />
n ⎟ =−<br />
n−1<br />
dx<br />
∫⎜ − ⎟<br />
dx<br />
−1 −1<br />
⎛<br />
= ( − ) ⋅( − + )<br />
−<br />
⎝<br />
1 n−2<br />
d 2 n k−2<br />
k k 1 ∫ ⎜ ( x 1) x dx<br />
n−2<br />
⎟<br />
dx<br />
−1<br />
x k <br />
<br />
⎛ ⎞ ⎛ n⎞<br />
⎜ ( x − 1) ⎟xdx = −1 k! ⎜ ( x −1)<br />
⎟dx<br />
=<br />
⎝ ⎠ ⎝ ⎠<br />
1 n<br />
1 n−k<br />
d 2 k d 2<br />
n<br />
n−k<br />
dx<br />
dx<br />
−1 −1<br />
∫ ∫ 0<br />
n<br />
( )<br />
⎞<br />
⎠<br />
<br />
[ ]<br />
<br />
<br />
Pn Pm Pn <br />
<br />
<br />
<br />
Pn Pm 1 <br />
<br />
m