A) \[-10\]
B) \[-7\]
C) 7
D) 10
Correct Answer: B
Solution :
Let the first term = a and common difference = d \[\therefore \] \[a+3d=14\] ...(i) And \[a+11d=70~\] ...(ii) On solving Eqs. (i) and (ii), we get \[d=7\] and \[a=-\,7\] \[\therefore \] First term \[~=-\,7\]You need to login to perform this action.
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