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Find x so that the vectors v= 3i−xj+2k and w= xi+j−2k are orthogonal.? A class has 10 boys and 12 girls. In how many ways can a committee of four be selected if the committee can ha? Prove that the additive identity of a ring is unique. That is, if 0 and
0′ are zero elements of a ring Will California fall off the continental shelf after this next earthquake? or will the leaning tower finally fall over into the streets? Write the following series in sigma notation: 2 + (4/3) + (8/9) + (16/27) + .... and determine the value that is converges to. Please help.?

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