1didnt do any mistake but forgot to mention the answer in one case
It happens very frequently to me!
and paper was easy completed in 2 Hrs
50 Answers
1
1yes by elementary transformation... I made mistake in X21 I got -50/9 instead of -2... But in the final answer i wrote -2 (coz i cross checked and came to know it will b -2, But during the steps i cudnt find the error-though i checked the sum 3 times) : ( Can some tell me how much will i get out of that 6 marks??..
1@ priyam .. i usually use this method (adjoint and then inverse) .. but elementary method is the shortest .. [50]
33and me..
:D
in findin A-1 for (linear eqns) me transpose nahi liye the... wasted 1/2 hour searching the mistake.. :D
1Board question:
What is the inverse of
3 0 -1
2 3 0
0 4 1
Using elementary transformations
I tried so many times....I didnt get the second row , first column number... Can someone post the solution
1@ priyam .. i don't know the complete question.. i am an isc board student dude .... sriraghav just mentioned that find the inverse .. so i just gave his answer .. [251]
waise elementary method toh bahut easy hai na ..
1K ankit...
Third row i got it as 24 12 something like that.../
CBSE guys pls how much mark will i get 4 that q....
11guyz can u please help by posting that method of elementary transformations ?
( im not in cbse board)
1guys atleast tell me whether my answer is correct or not .. !!! method choro ...
1I dont want to loose more than 3 in this Q.....
@Ankit..Even i was 4m ISC board - till 10th(ICSE)
1@subash...
Elementary transformations on a matrix...
→ interchange of two rows (or coloumns) of a matrix.
→ multiplication of elements of a row (or coloumn) wid a non-zero number.
→ adding or subtracting one row (or coloumn) from other row (or coloumn) by multiplying it wid a finite number.
These transformations are used to make d matrix simple to find rank, inverse and determinant... :)
@ankit...
ur answer is correct buddy... :)
11@ :-)
i knew to find rank with elementary transformation but how inverse
can u please elaborate on it