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JEE MAIN 2021
26-08-2021 S2
Question
If the projection of the vector $\hat{i}+2 \hat{j}+\hat{k}$ on the sum of the two vectors $2 \hat{i}+4 \hat{j}-5 \hat{k}$ and $-\lambda \hat{i}+2 \hat{j}+3 \hat{k}$ is 1 , then $\lambda$ is equal to $\_\_\_\_$ .
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