해법
확장 (x+6)20
해법
x20+120x19+6840x18+246240x17+6279120x16+120559104x15+1808386560x14+21700638720x13+211581227520x12+1692649820160x11+1.11715E13x10+6.09354E13x9+612⋅125970x8+613⋅77520x7+614⋅38760x6+615⋅15504x5+616⋅4845x4+617⋅1140x3+618⋅190x2+619⋅20x+620
솔루션 단계
(x+6)20
이항 정리 적용: (a+b)n=i=0∑n(in)a(n−i)bia=x,b=6
=i=0∑20(i20)x(20−i)⋅6i
합계 확장
=0!(20−0)!20!x20⋅60+1!(20−1)!20!x19⋅61+2!(20−2)!20!x18⋅62+3!(20−3)!20!x17⋅63+4!(20−4)!20!x16⋅64+5!(20−5)!20!x15⋅65+6!(20−6)!20!x14⋅66+7!(20−7)!20!x13⋅67+8!(20−8)!20!x12⋅68+9!(20−9)!20!x11⋅69+10!(20−10)!20!x10⋅610+11!(20−11)!20!x9⋅611+12!(20−12)!20!x8⋅612+13!(20−13)!20!x7⋅613+14!(20−14)!20!x6⋅614+15!(20−15)!20!x5⋅615+16!(20−16)!20!x4⋅616+17!(20−17)!20!x3⋅617+18!(20−18)!20!x2⋅618+19!(20−19)!20!x1⋅619+20!(20−20)!20!x0⋅620
0!(20−0)!20!x20⋅60간소화하다 :x20
1!(20−1)!20!x19⋅61간소화하다 :120x19
2!(20−2)!20!x18⋅62간소화하다 :6840x18
3!(20−3)!20!x17⋅63간소화하다 :246240x17
4!(20−4)!20!x16⋅64간소화하다 :6279120x16
5!(20−5)!20!x15⋅65간소화하다 :120559104x15
6!(20−6)!20!x14⋅66간소화하다 :1808386560x14
7!(20−7)!20!x13⋅67간소화하다 :21700638720x13
8!(20−8)!20!x12⋅68간소화하다 :211581227520x12
9!(20−9)!20!x11⋅69간소화하다 :1692649820160x11
10!(20−10)!20!x10⋅610간소화하다 :36288004.05391E19x10
11!(20−11)!20!x9⋅611간소화하다 :3628802.21122E19x9
12!(20−12)!20!x8⋅612간소화하다 :612⋅125970x8
13!(20−13)!20!x7⋅613간소화하다 :613⋅77520x7
14!(20−14)!20!x6⋅614간소화하다 :614⋅38760x6
15!(20−15)!20!x5⋅615간소화하다 :615⋅15504x5
16!(20−16)!20!x4⋅616간소화하다 :616⋅4845x4
17!(20−17)!20!x3⋅617간소화하다 :617⋅1140x3
18!(20−18)!20!x2⋅618간소화하다 :618⋅190x2
19!(20−19)!20!x1⋅619간소화하다 :619⋅20x
20!(20−20)!20!x0⋅620간소화하다 :620
=x20+120x19+6840x18+246240x17+6279120x16+120559104x15+1808386560x14+21700638720x13+211581227520x12+1692649820160x11+36288004.05391E19x10+3628802.21122E19x9+612⋅125970x8+613⋅77520x7+614⋅38760x6+615⋅15504x5+616⋅4845x4+617⋅1140x3+618⋅190x2+619⋅20x+620
x20+120x19+6840x18+246240x17+6279120x16+120559104x15+1808386560x14+21700638720x13+211581227520x12+1692649820160x11+36288004.05391E19x10+3628802.21122E19x9+612⋅125970x8+613⋅77520x7+614⋅38760x6+615⋅15504x5+616⋅4845x4+617⋅1140x3+618⋅190x2+619⋅20x+620간소화하다 :x20+120x19+6840x18+246240x17+6279120x16+120559104x15+1808386560x14+21700638720x13+211581227520x12+1692649820160x11+1.11715E13x10+6.09354E13x9+612⋅125970x8+613⋅77520x7+614⋅38760x6+615⋅15504x5+616⋅4845x4+617⋅1140x3+618⋅190x2+619⋅20x+620
=x20+120x19+6840x18+246240x17+6279120x16+120559104x15+1808386560x14+21700638720x13+211581227520x12+1692649820160x11+1.11715E13x10+6.09354E13x9+612⋅125970x8+613⋅77520x7+614⋅38760x6+615⋅15504x5+616⋅4845x4+617⋅1140x3+618⋅190x2+619⋅20x+620