已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561…
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已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561…
求(3-1)(3+1)(32+1)(34+1)•…•(332+1)+2的个位数字.
求(3-1)(3+1)(32+1)(34+1)•…•(332+1)+2的个位数字.
![已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561…](/uploads/image/z/2026385-17-5.jpg?t=%E5%B7%B2%E7%9F%A531%3D3%EF%BC%8C32%3D9%EF%BC%8C33%3D27%EF%BC%8C34%3D81%EF%BC%8C35%3D243%EF%BC%8C36%3D729%EF%BC%8C37%3D2187%EF%BC%8C38%3D6561%E2%80%A6)
原式=(3-1)(3+1)(32+1)(34+1)(38+1)(316+1)(332+1)+2
=(32-1)(32+1)(34+1)(38+1)(316+1)(332+1)+2
=(34-1)(34+1)(38+1)(316+1)(332+1)+2
=(38-1)(38+1)(316+1)(332+1)+2
=(316-1)(316+1)(332+1)+2
=(332-1)(332+1)+2
=364-1+2
=364+1,
64÷4=16,
所以364与34个位数字相同为1,
因此(3-1)(3+1)(32+1)(34+1)•…•(332+1)+2的个位数字是1+1=2.
=(32-1)(32+1)(34+1)(38+1)(316+1)(332+1)+2
=(34-1)(34+1)(38+1)(316+1)(332+1)+2
=(38-1)(38+1)(316+1)(332+1)+2
=(316-1)(316+1)(332+1)+2
=(332-1)(332+1)+2
=364-1+2
=364+1,
64÷4=16,
所以364与34个位数字相同为1,
因此(3-1)(3+1)(32+1)(34+1)•…•(332+1)+2的个位数字是1+1=2.
已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561…
已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561…,3n=?
已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561…,3n=?写
已知31=3,32=9,33=27,34=81,35=243,36=729,37=2187,38=6561,…请你根据此
已知:a=3
已知31=3,32=9,33=27,34=81,35=243,36=31是3的1次方,32是3的2次方,3n3的n次方
已知cos2θ=35
已知sinx=-13
已知a=199
已知y=4.
已知:30.756=0.9110
已知s=11981