JEE Main 202324 Jan, Evening shiftMathematicsHardVector Algebra184× since 2002Let a→=i^+2j^+λk^,b→=3i^−5j^−λk^,a→ . c→=7,2b→ . c→+43=0,a→×c→=b→×c→\overrightarrow a = \widehat i + 2\widehat j + \lambda \widehat k,\overrightarrow b = 3\widehat i - 5\widehat j - \lambda \widehat k,\overrightarrow a \,.\,\overrightarrow c = 7,2\overrightarrow b \,.\,\overrightarrow c + 43 = 0,\overrightarrow a \times \overrightarrow c = \overrightarrow b \times \overrightarrow ca=i+2j+λk,b=3i−5j−λk,a.c=7,2b.c+43=0,a×c=b×c. Then ∣a→ . b→∣\left| {\overrightarrow a \,.\,\overrightarrow b } \right|a.b is equal to :Your answerType your answer. Integers and decimals are accepted.CheckSkip · show solution
