Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Engineering Mathematics Calculus Vector Calculus

यदि \( \vec{O} A = \vec{a}\) और \(\vec{O}B=\vec{b}\) तो \(\vec{B}A\) का मान क्या होगा?

1
\(\mathop a\limits^ \to + \mathop b\limits^ \to\)
2
\(\mathop a\limits^ \to\)
3
\(\mathop b\limits^ \to\)
4
\(\mathop a\limits^ \to - \mathop b\limits^ \to\)
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