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Vectors aa n db make an angle theta=(2pi...

Vectors `aa n db` make an angle `theta=(2pi)/3dot` If `| vec a|=1,| vec b|=2,` then `{( vec a+3 vec b)xx(3 vec a- vec b)^2}` is equal to `225` b. `250` c. `275` d. 300

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RESONANCE DPP-JEE MAINS-All Questions
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