Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Quantitative Aptitude Algebra Identities

यदि a + b + c = 7 और a³ + b³ + c³ - 3abc = 175 है, तो (ab + bc + ca) का मान क्या है?

1

8

2

7

3

6

4

9

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