wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If a+1a=3, then the value of a2+1a2 is:_____.

A
7
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
9
No worries! Weā€˜ve got your back. Try BYJUā€˜S free classes today!
C
3
No worries! Weā€˜ve got your back. Try BYJUā€˜S free classes today!
D
27
No worries! Weā€˜ve got your back. Try BYJUā€˜S free classes today!
Open in App
Solution

The correct option is A 7
Using the identity, (a+b)2=a2+2ab+b2,

(a+1a)2=a2+2× a×1a+1a2
32=(a2+1a2)+2
(a2+1a2)=7.

flag
Suggest Corrections
thumbs-up
22
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Algebraic Identities
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon