Questions
If for some and in R, the intersection of the following three planes
x+4y-2z=1
x+7y-5z=
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a
0
b
10
c
2
d
-10
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Correct option is B
Given 3 planes has line of intersection which means infinite solutions So, Δ=0⇒14-217-515α=0⇒(7α+25)-(4α+10)+(-20+14)=0⇒α=-3 Also Dz=0⇒14117β155=0⇒1(35-5β)-(15)+1(4β-7)=0⇒β=13α+β=-3+13=10Similar Questions
The number of matrices whose entries are either and for which the system has exactly two distinct solutions, is
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