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NCERT Class XI Mathematics - Sequences and Series - Solutions

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Question : 44
Total: 106
x3,x5,x7 , ... n terms (if x ≠ ±1).
Solution:  
In the given G.P., a = x3, r = x2 and Sn =
a[1−rn]
1−r
 , if |r| < 1
∴ Sn = x3
[1−(x2)n]
1−x2
 =
x3[1−x2n]
1−x2
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