If p = 8.15, q = 9.06 and r = -17.21, then the value of p3 + q3 + r3 - 3pqr is:

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SSC CGL 2022 Tier-I Official Paper (Held On : 12 Dec 2022 Shift 3)
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  1. -3.81
  2. -5.62
  3. 4.75
  4. 0

Answer (Detailed Solution Below)

Option 4 : 0
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Detailed Solution

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Given:

p = 8.15, q = 9.06 and r = -17.21

Concept used:

If a + b + c = 0

Then,

a3 + b3 + c3 - 3abc = 0

Calculation:

p + q + r = 8.15 + 9.06 - 17.21

⇒ 17.21 - 17.21

⇒ 0

So, p3 + q3 + r3 - 3pqr = 0

∴ The required answer is 0.

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