5a. In an arithmetic sequence of numbers a1 = -4 and a6 = 46.  Which of the following is the value of a12?  (1) 120 (3) 92  (2) 146 (4) 106  5b. The first term of an arithmetic sequence whose common difference is 7 and whose 22nd term is given by a22 = 143 is which of the following? (1) -25  (3) 7  (2) -4   (4) 28

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A: Question is solvled.

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A: an=a+(n-1)d

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A: Using previous sequence,

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