Răspuns:
Explicație pas cu pas:
8^330 = (2^3)^330 = 2^990
8^670 = (2^3)^670 = 2^2010
128^287 = (2^7)^287 = 2^2009
2^2010 - 2^2009 = 2^2009*(2 - 1) = 2^2009
a = 2^990*2^2009*2 = 2^3000
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27^1000 = (3^3)^1000 = 3^3000
9^501 = (3^2)^501 = 3^1002
81^250 = (3^4)^250 = 3^1000
3^2 - 3^0 = 9 - 1 = 8
9^501 - 81^250 = 3^1002 - 3^1000 = 3^1000*(9 - 1) = 8*3^1000
b = 3^3000 : (8*3^1000 : 8) = 3^3000 : 3^1000 = 3^2000
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a = 2^3000 = (2^3)^1000 = 8^1000
b = 3^2000 = (3^2)^1000 = 9^1000
b > a