Teaching UP TGT Mock Test Series 2025 Mathematics Vector Algebra Scalar and Vector Product

माना \(|\vec{a}|= 3\) और \(|\vec{b}|= 4\) । λ का मान जिसके लिए \(\vec{a}+\lambda \vec{b}\) और \(\vec{a} - \lambda \vec{b}\) लंबवत हैं किसके द्वारा दिया गया है?

1
\(±\frac{3}{4}\)
2
\(-\frac{2}{3}\)
3
\(\frac{2}{3}\)
4
\(-\frac{3}{5}\)
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