質問: how many terms are there in the a.p? `7,\ 10 ,\ 13 ,\ 43.` (ii) `-1,\ -5/6,\ -2/3,\ -1/2,\ ddot,(10)/3dot` (iii) `7,\ 13 ,\ 19 ,\ ddot,\ 205` . (iv) `18 ,\ 15 1/2,\ 13 ,\ ddot,\ -47` . how many terms are there in the a.p? `7,\ 10 ,\ 13 ,\ 43.` (ii) `-1,\ -5/6,\ -2/3,\ -1/2,\ ddot,(10)/3dot` (iii) `7,\ 13 ,\ 19 ,\ ddot,\ 205` . (iv) `18 ,\ 15 1/2,\ 13 ,\ ddot,\ -47` .
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