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If vectors veca = 2hati + 2hatj +3hatk,v...

If vectors `veca = 2hati + 2hatj +3hatk,vec b=-hati+2hatj+hatk` and `vec c=3 hati+hatj` are such that `veca +lambdavecb` is perpendicular to `vec c`, then find the value of `lambda`.

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