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Which term of the sequence 20 ,\ \ 19...

Which term of the sequence `20 ,\ \ 19 1/4,\ \ 18 1/2,\ \ 17 3/4,\ dot` is the first negative term?

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  14. Find: 18th term of the A.P. sqrt(2),\ 3sqrt(2),\ 5sqrt(2) ddot

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  15. Find n t h term of the A.P. 13 ,\ 8,\ 3,\ -2,\ dot

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  16. Find 10 t h term of the A.P. -40 ,\ -15 ,\ 10 ,\ 35 ,\

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  17. Find 8t h term of the A.P. 117 ,\ 104 ,\ 91 ,\ 78 ,\

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