√2
√5
3
5
Correct answer is A
Common ratio r of the G.P is
r=Tn+1Tn=T2T1
r=√10+2√5√10+√5
r=√10+2√5√10+√5×√10−√5√10−√5
=(√10)(√10)+(√10)(−√5)+(2√5)(√10)+(2√5)(−√5)(√10)2−(√5)2
10−√50+2√50−1010−5
√505
√25×25
5√25
√2
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