Question

Without Actually calculating the cubes find the value of (1/2)+(1/3)2-(5/6) b) Evaluate by suitable
identity(96)³​

Answer 1

Answer:

According to the question,

a = 1/2, b = 1/3 and c= -5/6

a+b+c=0

Using cubic identities,

a³ + b³ + c³ = 3abc 3

(1/2)³ + (1/3)³ - (5/6)³ = 3 × 1/2 × 1/3 × (-5/6)

(1/2)³+ (1/3)³ - (5/6)³ = -5/12

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