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All posts related to Mathematics

Aman Yadav
Shared from Matrices & Determinants on Aug 26, 2020 1:12 AM

A and B are any two square matrices which one of the following is a skew symmetric matrix?

 
None of above
Please type your answer before submitting.
Aman Yadav

Sir answer is A-A'/2

Supriya Singh
Shared from NDA - I (2015) Maths on Aug 17, 2020 12:28 PM

Given that the vectors and are non-collinear. The values of x and y, respectively, for which – = holds true if = 2x + y and = 2– 5, are

 
x = 2, y = 1
x = 1, y = 2
x = – 2, y = 1
x = – 2, y = – 1
Please type your answer before submitting.
Supriya Singh

How can you solve this question without giving value of vector v????

Supriya Singh
Shared from NDA - (II) 2014 Maths on Aug 14, 2020 10:28 AM

Consider the plane passing through the points A (2, 2, 1), B (3, 4, 2) and C (7, 0, 6).

Which of the following points lies on the plane?

 
(1, 0, 9)
(1, 0, 1)
(0, 0, 1)
None of the above
Please type your answer before submitting.
Supriya Singh

As when we will put value of x and z the answer will be 0 not 1

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Ganesh Sai
Shared from JEE Main Mock - 1 on Jul 11, 2020 11:57 AM

In a plane, there are 37 straight lines, out of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through the same point, no line passes through both points A and B, and no two lines are parallel. The number of intersection points the lines have is equal to

 
535
601
728
963
Please type your answer before submitting.
Ganesh Sai

Here my doubt is it is given that 13 pass through point A and 11 pass through point B. at the same time it is give that no three lines pass through the same point. how is this possible?

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Aniket Kumar
Shared from Sets, Functions and Relations - III on Jul 02, 2020 6:28 PM

Let A = {1, 2, 3, 4} and let R = {(2, 2), (3, 3), (4, 4), (1, 2)} be a relation on A. Then R is

 
reflexive
symmetric
transitive
None of these
Please type your answer before submitting.
Aniket Kumar

Recheck your solution..