Order of a matrix [ 2 5 7 ] is
The order of matrix is defined by (row × column). The follwing matrix has 1 row and 3 columns. So, the correct option is (d) i.e 1×3.
The value of
To find the determinant we have to cross mutliply the elements and then subtract it.
cos2θ - (-sin2θ) = 1
If , then the value of |2A| is same as
Due to the rule if a square matrix is of order n x n then, |kA|= kn |A|
Value of the determinant
(a2 + b2)×1 - (2a) × b
= a2 +b2 - 2ab
= (a - b)2
If , then the value of x is
As value of both determinants are equal
∴ (1×1) -(1×1)= 4x - 2
0= 4x-2.
4x = 2.
x = 2/4 =1/2
is equal to
Determinant = [(a2 + b2).1 - (-2ab)]
= (a+b)2
If , then the value of x is
As the value of both determinants are equal,
∴ 1 = x2
x = ±1
, then the value of x is
8-6 = 4x-2x
⇒ x = 1
The value of is
Δ = 1/2 [2(1-8) -7(1-10) +1(8-10)]
= 47/2
9(2x+5) - 3(5x+2) = 0
3x = -39
x = -13
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