1

JEE Main 2020 (Online) 4th September Morning Slot

Numerical

+4

-0

If the system of equations

x - 2y + 3z = 9

2x + y + z = b

x - 7y + az = 24,

has infinitely many solutions, then a - b is equal to.........

x - 2y + 3z = 9

2x + y + z = b

x - 7y + az = 24,

has infinitely many solutions, then a - b is equal to.........

Your input ____

2

JEE Main 2020 (Online) 3rd September Evening Slot

Numerical

+4

-0

Let S be the set of all integer solutions, (x, y, z),
of the system of equations

x – 2y + 5z = 0

–2x + 4y + z = 0

–7x + 14y + 9z = 0

such that 15 $$ \le $$ x

x – 2y + 5z = 0

–2x + 4y + z = 0

–7x + 14y + 9z = 0

such that 15 $$ \le $$ x

^{2}+ y^{2}+ z^{2}$$ \le $$ 150. Then, the number of elements in the set S is equal to ______ .Your input ____

3

JEE Main 2020 (Online) 3rd September Morning Slot

Numerical

+4

-0

Let A = $$\left[ {\matrix{
x & 1 \cr
1 & 0 \cr
} } \right]$$, x $$ \in $$ R and A

If a

^{4}= [a_{ij}].If a

_{11}= 109, then a_{22}is equal to _______ .Your input ____

4

JEE Main 2020 (Online) 8th January Morning Slot

Numerical

+4

-0

The number of all 3 × 3 matrices A, with
enteries from the set {–1, 0, 1} such that the sum
of the diagonal elements of AA

^{T}is 3, isYour input ____

Questions Asked from Matrices and Determinants (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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