(A) 4
(2) for simultaneous equations in va
(A) 7
(3)Find the value of %, 3.
Answers
Answered by
0
Answer:Correct option is
B
x=
5
2
,y=
5
−1
Given equations are 3x+y=1 and 2x=11y+3
For cramers rule, We first find
D=(
3
2
1
−11
)
⇒∣D∣=
∣
∣
∣
∣
∣
∣
3
2
1
−11
∣
∣
∣
∣
∣
∣
=3×−11−1×2=−33−2=−35
For x matrix
D
x
=[
1
3
1
−11
]
⇒[D
x
]=
∣
∣
∣
∣
∣
∣
1
3
1
−11
∣
∣
∣
∣
∣
∣
=1×−11−1×3=−11−3=−14
For y matrix
D
y
=[
3
2
1
3
]
⇒[D
y
]=
∣
∣
∣
∣
∣
∣
3
2
1
3
∣
∣
∣
∣
∣
∣
=3×3−1×2=9−2=7
Therefore, x=
D
D
x
=
−35
−14
=
5
2
and y=
D
D
y
=
−35
7
=−
5
1
Answer is option B.
Step-by-step explanation:
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