解答
展开 −96(s+s′)10
解答
−96s10−960s9s′−4320s8(s′)2−11520s7(s′)3−20160s6(s′)4−24192s5(s′)5−20160s4(s′)6−11520s3(s′)7−4320s2(s′)8−960s(s′)9−96(s′)10
求解步骤
−96(s+s′)10
(s+s′)10=s10+10s9s′+45s8(s′)2+120s7(s′)3+210s6(s′)4+252s5(s′)5+210s4(s′)6+120s3(s′)7+45s2(s′)8+10s(s′)9+(s′)10
=−96(s10+10s9s′+45s8(s′)2+120s7(s′)3+210s6(s′)4+252s5(s′)5+210s4(s′)6+120s3(s′)7+45s2(s′)8+10s(s′)9+(s′)10)
打开括号=(−96)s10+(−96)⋅10s9s′+(−96)⋅45s8(s′)2+(−96)⋅120s7(s′)3+(−96)⋅210s6(s′)4+(−96)⋅252s5(s′)5+(−96)⋅210s4(s′)6+(−96)⋅120s3(s′)7+(−96)⋅45s2(s′)8+(−96)⋅10s(s′)9+(−96)(s′)10
使用加减运算法则+(−a)=−a=−96s10−96⋅10s9s′−96⋅45s8(s′)2−96⋅120s7(s′)3−96⋅210s6(s′)4−96⋅252s5(s′)5−96⋅210s4(s′)6−96⋅120s3(s′)7−96⋅45s2(s′)8−96⋅10s(s′)9−96(s′)10
化简 −96s10−96⋅10s9s′−96⋅45s8(s′)2−96⋅120s7(s′)3−96⋅210s6(s′)4−96⋅252s5(s′)5−96⋅210s4(s′)6−96⋅120s3(s′)7−96⋅45s2(s′)8−96⋅10s(s′)9−96(s′)10:−96s10−960s9s′−4320s8(s′)2−11520s7(s′)3−20160s6(s′)4−24192s5(s′)5−20160s4(s′)6−11520s3(s′)7−4320s2(s′)8−960s(s′)9−96(s′)10
=−96s10−960s9s′−4320s8(s′)2−11520s7(s′)3−20160s6(s′)4−24192s5(s′)5−20160s4(s′)6−11520s3(s′)7−4320s2(s′)8−960s(s′)9−96(s′)10