Answers

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2016-02-26T14:29:18+05:30
A = 7
d=9
349 = 7 + (n-1)9
342=(n-1)9
38=n-1
39 = n

2 5 2
2016-02-26T14:43:56+05:30
A=7
d=16-7=9
An=349
An=a+(n-1)d
349=7+(n-1)9
349-7=(n-1)9
342/9=n-1
38+1=n
n=39
total number of terms are 39
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