The first term of a linear sequence is 9 and the common d...
The first term of a linear sequence is 9 and the common difference is 7. If the nth term is 380, find the value of n.
45
54
56
65
Correct answer is B
Tn=a+(n−1)d
380=9+(n−1)7
380=9+7n−7⟹380=2+7n
7n=380−2=378∴
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