Test Index

NCERT Class XI Mathematics - Sequences and Series - Solutions

© examsnet.com
Question : 39
Total: 106
For what values of x, the numbers -
2
7
 , x , −
7
2
 are in G.P. ?
Solution:  
We have, -
2
7
 , x , −
7
2
 are in G.P.
∴
x
(−
2
7
)
 =
(−
7
2
)
x
 ⇒ x2 ⇒ x = ± 1
© examsnet.com
Go to Question:
Prev Question
Next Question