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

Assertion :If a,b,c are in Arithmetic Progression, then the system of equations:
3x+4y+5z=a ------- (1)
4x+5y+6z=b -------(2)
5x+6y+7z=c ------(3) are consistent.
Reason: If |A|0, the system of equations AX=B is consistent.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Assertion is correct but Reason is incorrect
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Assertion is incorrect but Reason is correct
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
If |A|0, A is invertible and we can write AX=B as X=A1B.
AX=B has a unique solution and hence is consistent.
Subtracting (2) from (3) and (1) from (2), we get the system of equation as
3x+4y+5z=a -------(4)
x+y+z=ba -------(5)
x+y+z=cb -------(6)
As a,b,c are in A.P. ba=cb
the last two equations are identical.
From (4) and (5) we obtain
x=4b5a+k
y=4a3b2k
z=k
where k is an arbitrary complex number. Thus, the system of equations in statement-1 is consistent.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon