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Byju's Answer
Standard VIII
Mathematics
Differences of Squares of Triangular Numbers and Converse
9 sum 9....
Question
9 sum
9
.
T
r
a
n
s
f
o
r
m
1
-
1
2
2
1
3
3
2
4
i
n
t
o
a
n
u
p
p
e
r
t
r
i
a
n
g
u
l
a
r
m
a
t
r
i
x
b
y
s
u
i
t
a
b
l
e
c
o
l
u
m
n
t
r
a
n
s
f
o
r
m
a
t
i
o
n
s
.
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Solution
Dear student,
1
-
1
2
2
1
3
3
2
4
A
p
p
l
y
i
n
g
R
2
→
R
2
-
2
R
1
a
n
d
R
3
→
R
3
-
3
R
1
1
-
1
2
0
3
-
1
0
5
-
2
A
p
p
l
y
i
n
g
R
3
→
R
3
-
5
3
R
2
1
-
1
2
0
3
-
1
0
0
-
1
3
Now, we get upper triangular matrix.
Regards
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