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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3 [3]<br />
m<br />
−<br />
( ) ∑ m k −<br />
( ) ( )<br />
m m m k k<br />
d 2 d d d<br />
( x − 1) = ( x+ 1) ( x− 1)<br />
= C x+ 1 x+<br />
1<br />
dx dx dx dx<br />
m m m k k<br />
k = 0<br />
m<br />
∑<br />
m<br />
k = 0<br />
m<br />
k = 0<br />
n n n n n<br />
( )<br />
( 1) ( ( ) 1)( 1) ⎤⎡ ( 1) ( 1)( )<br />
n− m−k n−k<br />
= C ⎡<br />
k<br />
n⋅ n− n− m− k + x+ n⋅ n− n− k+ x−1 ⎤<br />
⎣<br />
⎦⎣<br />
⎦<br />
m<br />
n! n!<br />
= ∑ Ck<br />
x+ x−<br />
n− m+ k !( n−k)!<br />
( )<br />
n m k<br />
( 1) ( 1)<br />
− + n−k<br />
…<br />
<br />
m=n <br />
n<br />
1 d 1 n! n!<br />
P ( x) = x − 1 = C x+<br />
1 x 1<br />
2 n! dx 2 n! k!( n−<br />
k)!<br />
n<br />
2<br />
( ) ∑<br />
( ) ( − )<br />
n n n n n k<br />
k = 0<br />
n<br />
1<br />
= ∑ n k<br />
+ −<br />
2<br />
n<br />
k = 0<br />
<br />
2 k<br />
( C ) ( x 1) ( x 1)<br />
n k n−k<br />
n−k<br />
n <br />
x [1,1]<br />
1 1<br />
( n−n)<br />
P (1) = C 2 0 = C 2 0 = 1<br />
n<br />
2 k ( n−k)<br />
2 n<br />
n n∑( n k)<br />
n<br />
( n n)<br />
2 k = 0 2<br />
1<br />
1<br />
1 1<br />
n<br />
P ( − 1) = C 0 ( − 2) = C 0 − 2 = ( −1)<br />
n<br />
2 k ( n−k)<br />
2 0<br />
n n∑( n k)<br />
n n 0<br />
2 k = 0<br />
2<br />
1<br />
( ) ( )<br />
<br />
n