1

WB JEE 2021

MCQ (Single Correct Answer)

+1

-0.25

If a

$$\left| {\matrix{ {\log {a_n}} & {\log {a_{n + 1}}} & {\log {a_{n + 2}}} \cr {\log {a_{n + 3}}} & {\log {a_{n + 4}}} & {\log {a_{n + 5}}} \cr {\log {a_{n + 6}}} & {\log {a_{n + 7}}} & {\log {a_{n + 8}}} \cr } } \right|$$ is equal to

_{n}(> 0) be the n^{th}term of a G.P. then$$\left| {\matrix{ {\log {a_n}} & {\log {a_{n + 1}}} & {\log {a_{n + 2}}} \cr {\log {a_{n + 3}}} & {\log {a_{n + 4}}} & {\log {a_{n + 5}}} \cr {\log {a_{n + 6}}} & {\log {a_{n + 7}}} & {\log {a_{n + 8}}} \cr } } \right|$$ is equal to

2

WB JEE 2021

MCQ (Single Correct Answer)

+1

-0.25

Let T and U be the set of all orthogonal matrices of order 3 over R and the set of all non-singular matrices of order 3 over R respectively. Let A = {$$-$$1, 0, 1}, then

3

WB JEE 2021

MCQ (Single Correct Answer)

+2

-0.5

The determinant $$\left| {\matrix{
{{a^2} + 10} & {ab} & {ac} \cr
{ab} & {{b^2} + 10} & {bc} \cr
{ac} & {bc} & {{c^2} + 10} \cr
} } \right|$$ is

4

WB JEE 2020

MCQ (Single Correct Answer)

+1

-0.25

Let A = $$\left( {\matrix{
{3 - t} \cr
{ - 1} \cr
0 \cr
} \matrix{
{} \cr
{} \cr
{} \cr
} \,\matrix{
1 \cr
{3 - t} \cr
{ - 1} \cr
} \matrix{
{} \cr
{} \cr
{} \cr
} \matrix{
0 \cr
1 \cr
0 \cr
} } \right)$$ and det A = 5, then

Questions Asked from Matrices and Determinants (MCQ (Single Correct Answer))

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