IPMAT/Modern Math•1mo
xlrijamshedpur

How to solve this

3

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Comments (9)

S
shashiinwater
•1mo

if one row is an equation , rank represents the number of rows which give different information.

here the first and second rows give different equations , applying row operations on row3 and row4 results in them being identical to row2 , therefore giving no new information about the equations.

and thats basically 2 linear equations

think of it like 2x+4y=0 and 4x+8y=0 , both the equations are basically the same , we have to apply transformations to identify which of them may be same

2
A
aarushmishra
•1mo

rank to bhai 12th maths me bhi aaj tak nahi suna 🙂

2
6
6ix7even
•1mo

4, no. of non-linear rows is 'rank'

1
X
xlrijamshedpur
OP•1mo

i also thought the same but its 2

1
6
6ix7even
•1mo

any explaination given or just key

2
X
xlrijamshedpur
OP•1mo

no they only gave key to it no explaination, thats why i asked it here

2
J
johangetsmogged
•1mo

wtf is a rank

if it means determinant, than its gonna be very tedious

Youd need to find determinant of 3*3 matrix 4 times

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X
xlrijamshedpur
OP•1mo

it was in my coaching module i also dont know.

2
M
manit1111
•1mo

nah its not determinant it is smtg related to independent columns or rows

2