Question

(i) x, y, z তিনটি বাস্তব সংখ্যা, x < y এবং z < 0 হলে,
(a) x×z < y×z
(b) x×z > y×z
(c) x×z < y×z
(d) x×z = y×z​

Answer 1

Given :  x, y, z তিনটি বাস্তব সংখ্যা, x < y এবং z < 0 হলে,

 x, y, z are three real numbers, x <y and z <0,  

To find : Choose correct option

(a) x×z < y×z

(b) x×z > y×z

(c) x×z < y×z

(d) x×z = y×z​

Solution:

 x, y, z are three real numbers, x <y and z <0,

x  <  y

z <0,

=> xz >  yz

option b is correct  

Example : x  = 5    y  =  6   as 5 < 6

z = - 1

xz  = - 5

yz  = - 6

-5  >  - 6

xz > yz

Another example

x =  - 6    y  = - 5  as - 6 < - 5

z = -1

xz =   6

yz = 5

6 > 5

xz > yz

(b) x×z > y×z  is correct option

Learn more:

x, y and z are three real numbers. If x &lt;y and z&lt;0 then,(a) xxz &lt

https://brainly.in/question/19717075

Three real no.x, y, z are such that x^2+6y=-17, y^2 +4z=1 and z^2+ ...

brainly.in/question/18031273

If the ordered triplets of real numbers (x, y, z) satisfy √x-y+z=√x ...

brainly.in/question/18708970

Answer 2

Step-by-step explanation:

answer Ansar jante chai