book Maths Puzzle Numerical Ability

let F be a subfieldof the complex numbers and let T be the function from F^3 into F^3 defined by T(x1,x2,x3)=(x1-x2+2x3,2x1+x2,-x1-2x2+2x3)
a} verify that T is a linear

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book Other Question
Complete the sequence: 19, 5, 17, 21, 5, 14, 3, ____. Explain your answer. How do I divide this problem by moving the decimal point?

32.85 divided by 1,000

Thanks,
Lyn