write the cube of 3a +1/3a please answer only if u know it it is very important
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write the cube of 3a +1/3a please answer only if u know it it is very important
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Step-by-step explanation:
(3a + 1/3a)³
we know the (a+b)³ = a³ + b³ 3ab(a+b)
= (3a)³ + (1/3a)³ + 3(3a)(1/3a)(3a + 1/3a)
= 9a³ + 1/9a³ + 3(3a + 1/3a)
= 9a³ + 1/9a³ + 3a + 1/3
= 9a³ + 1/9a³ + 3a/3 + 1/3
= 9a³ + 1/9a³ + a + 1/3
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