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Zia
Subject: Maths
, asked on 4/4/18
Q. Using row elementary transformation find the inverse of the following
2
-
1
4
4
0
2
3
-
2
7
Answer
1
Zia
Subject: Maths
, asked on 3/4/18
My question is from Matrices grade 12
Q. Let A =
0
-
tan
α
2
tan
α
2
0
I
+
A
=
(
I
–
A
)
cosα
-
sin
α
sinα
cos
α
Answer
1
Zia
Subject: Maths
, asked on 3/4/18
My question is from Matrices grade 12
I
f
A
=
cos
θ
i
sin
θ
i
sin
θ
cos
θ
t
h
e
n
p
r
o
v
e
b
y
P
M
I
A
n
=
cos
n
θ
i
sin
θ
i
sin
θ
cos
n
θ
Answer
2
Siraj
Subject: Maths
, asked on 3/4/18
using elementary transformation find the inverse of the matrix I 1 2 3 I
I 2 5 7 I
I -2 -4 -5 I
Answer
1
Drishti
Subject: Maths
, asked on 3/4/18
In the following matrix a represents the weight in kg of packets of diff types of grains availablein market while matrix b represents the price per kg in shops 1 and 2 .
Weight in kg
Wheat rice barley
A=100 50 150
Price per kg
Shop 1 shop 2
B= 10 5 wheat
12 14 barley
14 16 rice
If ramu wants to purchase packets in a ratio of 2:3:1 from shop 1 then find gain or loss percentage experienced by him wirth respect to shop2.
Answer
0
Amitha
Subject: Maths
, asked on 1/4/18
Can any one plz help me in solving que no 14 and 15 ...!!!???
Answer
1
Amitha
Subject: Maths
, asked on 1/4/18
A square matrix B satisfies B2=I -B ,where I is identity matrix .If Bn =5I -8B,then find n
Answer
1
Gitika
Subject: Maths
, asked on 1/4/18
q no 49
Answer
1
Takshitha
Subject: Maths
, asked on 30/3/18
if A is a skew symmetric matrix and n€N such that (A^n)^T=kA^n,write the value of k
Answer
2
Dharunika Vijayakumar
Subject: Maths
, asked on 24/3/18
if A is any square matrix , then prove that A(adjA)=(adjA)A=|A|I where I is the unit of the same matrix
Answer
1
Ashok
Subject: Maths
, asked on 23/3/18
How to do elementary transformation for this?
16.
1
3
-
2
-
3
0
-
5
2
5
0
A
=
I
A
How to do elementary transformation for this?
Answer
1
Tarul Jhalani
Subject: Maths
, asked on 21/3/18
15
Answer
1
Tarul Jhalani
Subject: Maths
, asked on 21/3/18
F
i
n
d
t
h
e
n
u
m
b
e
r
o
f
t
h
e
m
a
t
r
i
x
1
-
1
1
2
1
-
3
1
1
1
a
n
d
w
i
t
h
h
e
l
p
o
f
t
h
i
s
s
o
l
v
e
t
h
e
s
y
s
t
e
m
o
f
e
q
u
a
t
i
o
n
:
1
0
1
2
1
0
0
1
1
x
y
z
=
1
2
2
y
6
z
-
2
x
+
2
2
0
1
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 20/3/18
Q. Solve the following system of equations by matrix inversion method.
3
x
-
1
y
+
2
z
=
5
2
x
+
3
y
-
4
z
=
-
3
1
x
+
2
y
+
6
z
=
2
Answer
1
Tks Arunachalam
Subject: Maths
, asked on 20/3/18
Q. Show that the matrix B'AB is symmetric or skew symmetric according as A is symmetric or skew-symmetric.
Answer
1
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What are you looking for?
Q. Let A =
I 2 5 7 I
I -2 -4 -5 I
Weight in kg
Wheat rice barley
A=100 50 150
Price per kg
Shop 1 shop 2
B= 10 5 wheat
12 14 barley
14 16 rice
If ramu wants to purchase packets in a ratio of 2:3:1 from shop 1 then find gain or loss percentage experienced by him wirth respect to shop2.
q no 49
16. How to do elementary transformation for this?