defence exam CISF Constable Fireman Mock Test 2024 Quantitative Aptitude Algebra Identities

यदि p + q + r = 5; p³ + q³ + r³ = 30 और p² + q² + r² = 15 है, तो 3pqr का मान ज्ञात कीजिए।

1

-20

2

20

3

25

4

-25

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