A) \[\text{144}\,\text{c}{{\text{m}}^{\text{2}}}\]
B) \[\text{121 c}{{\text{m}}^{\text{2}}}\]
C) \[\text{1}00\,\text{c}{{\text{m}}^{\text{2}}}\]
D) \[\text{81 c}{{\text{m}}^{\text{2}}}\]
Correct Answer: C
Solution :
Since \[{{t}_{n}}=a+(n-1)d\], \[\Rightarrow \] \[999=9+(n-1)9\]\[\Rightarrow \]You need to login to perform this action.
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