Question

(m-1/m=5)finf value of mcube -1/mcube

Answer 1

Answer:

we will find m³- 1/m³. by using identity

(a-b)³ = a³ - b³ -3ab(a-b)

so,

(m-1/m)³ = m³ - 1/m³ -3×m×1/m (m-1/m)

(5)³ = m³ - 1/m³ -3×5

125 = m³ - 1/m³ -15

m³ - 1/m³ = 125 + 15

m³ - 1/m³ = 140

Step-by-step explanation:

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