Question 1: Find , if
[2003]
Answer:
Therefore
and
Hence
Question 2: Given , find: i) the order of matrix
ii) the matrix
[2012]
Answer:
Therefore . Hence the order of Matrix is
Let
Therefore
Therefore
and
Solving we get
Hence
Question 3: If find the value of
. [1981]
Answer:
Therefore
Question 4: If , and
find: i)
ii)
[1991]
Answer:
i)
ii)
Question 5: Find , if
[1992, 2013]
Answer:
Therefore
and
Question 6: Given ,
and
; Find
such that
. [2005]
Answer:
Question 7: Find the value of given that
,
, and
. [2005]
Answer:
Therefore
Question 8: If , and
and
matrix of the same order and
is the transpose of the matrix, find
. [2011]
Answer:
Question 9: Given ,
and
; Find the matrix
such that
. [2013]
Answer:
Question 10: Let ,
and
. Find
[2006]
Answer:
Question 11: Let ,
. Find
[2007]
Answer:
Question 12: Given ,
and
and
. FInd the value of
. [2008]
Answer:
Therefore
and
Question 13: Given ,
,
and
. Find
. [2010]
Answer:
Question 14: Evaluate [2010]
Answer:
Question 15: If ,
, find
. [2012]
Answer:
Question 16: If . Find
. [2014]
Answer:
Question 17: Solve for
i)
ii)
iii) [2014]
Answer:
i)
Therefore
Solving the above two equations we get
and
ii)
Therefore
Also
Substituting we get
iii)
Therefore
Question 18: If and
, is the product of
possible. [2011]
Answer:
The order of matrix and the order of matrix
.
Since the number of columns in is equal to the number of rows in
, the product
is possible.
Some somes have wrong answer
Pls edit again
It creates confusion
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could you please provide the incorrect question number… we will fix it.
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best site for icse practice loved it
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could you please point me the the wrong question… will fix it
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