3^x=a ,3^y=b ,求3^(2X=Y+1)和3^(2X=Y-1)的值
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3^x=a ,3^y=b ,求3^(2X=Y+1)和3^(2X=Y-1)的值
3^x=a ,3^y=b ,求3^(2X=Y+1)和3^(2X=Y-1)的值
3^x=a ,3^y=b ,求3^(2X=Y+1)和3^(2X=Y-1)的值
3^(2x+y+1)
=3^2x*3^y*3^1
=(3^x)²*3^y*3
=3a²b
3^(2x+y-1)
=3^2x*3^y÷3^1
=(3^x)²*3^y÷3
=a²b/3
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