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Mathematics 12th class

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how to prepare for emcet examinations

sahanahegde44 20th Oct, 2020

Hello aspirant,

Eamcet is a general state level entrance examination , and preparation is required to crack the test.

some of them include:

  • Solving previous year question papers and attending mock tests topic wise, This will make you more confident and prepared.
  • Managing time efficiently during exam which will fetch you more marks.
  • planning accordingly with study materials is necessary.
  • stay fit and healthy , Be calm and revise enough to attend your tests confidently.

All these tips will surely help a candidate to ace the examination.

Thankyou.

Hope this helps.

Good luck for everything ahead! :)

378 Views

lines are perpendicular find combined eqn 3x2-4xy=0

Afifa 5th Aug, 2020

Hello dear,

Given equation is 3x^2-4xy=0

x(3x-4y) =0

separate equations of the lines are x = 0 and 3x-4y =0

let m1 and m2 be the slopes of these lines

then m1 does not exist and m2 =3/4

now, required lines are perpendicular to these lines

their slopes are -1/m1 and -1/m2

since m1 does not exist -1/m1 =0

also , m2 = 3/4 , -1/m2 =-4/3

Their combined equation is 4xy +3y^2 =0

8540 Views

If Rank of A is 2 and Rank of B is 3 then the Rank of AB is ?

ADITYA KUMAR Student Expert 3rd Oct, 2019

Hello there!

Greetings!

To solve these kind of questions you should always remember that if A and B are matrices then rank of AB is always less than or equal to rank of matrix A . And if the matrix B is a non -singular matrix then rank of AB is equal to A . So in case if B is a non -singular matrix then rank of (AB)= rank(A)=2 (given).

Thankyou

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