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wavhalw:
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Answer:
a³/b³ =7³/3³
take -1 in both sides...
a³/b³ -1 = 7³/3³-1
a³/b³-b³/b³ =7³/3³ - 3³/3³
(a³-b³)/b³ =(7³-3³)/3³
=(343-27)/27
=316/27
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