CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If the trace of two matrices A=[2a25396b] and B=[b2538a8] are equal,where a,bR, then 2ab equals to

A
0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 1
From given matrices, Tr(A)=2a2+96b
Tr(B)=b2+8a8
As, Tr(A)=Tr(B)
2a2+96b=b2+8a82(a24a+4)+b26b+9=02(a2)2+(b3)2=0
a2=0 and b3=0
a=2,b=3
So, 2ab=1

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Transpose of a Matrix
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon