A) 256
B) 512
C) 1024
D) none of these
Correct Answer: B
Solution :
\[a{{r}^{4}}=2\] ... (i) Let \[a\] be the first term and \[r\] be the common ratio, then according to the given condition. Since, \[a\times ar\times a{{r}^{2}}\times a{{r}^{3}}\times a{{r}^{4}}\times a{{r}^{5}}\] \[\times a{{r}^{6}}\times a{{r}^{7}}\times a{{r}^{8}}\] \[={{a}^{9}}{{r}^{36}}={{(a{{r}^{4}})}^{9}}={{2}^{9}}=512\]
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