
26x28x(26+1/27+1/27+28)跪求过程,
2个回答
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26X28X(26+1/27+1/27+28)
=(27-1)X(27+1)X((27-1)+1/27+1/27+(27+1))
=(27^2-1)X(27-1+1/27+1/27+27+1)
=(27^2-1)X(27+27+1/27+1/27
=(27^2-1)X2X(27+1/27)
=2X(27^2-1)X(27^2+1)/27
=2X(27^4-1)/27
=2X(27^3-1/27)
=2X(3^9-1/3^3)
=(27-1)X(27+1)X((27-1)+1/27+1/27+(27+1))
=(27^2-1)X(27-1+1/27+1/27+27+1)
=(27^2-1)X(27+27+1/27+1/27
=(27^2-1)X2X(27+1/27)
=2X(27^2-1)X(27^2+1)/27
=2X(27^4-1)/27
=2X(27^3-1/27)
=2X(3^9-1/3^3)
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