Question

Answer 13 th question. ​

Answer 1

Answer:

b one is wrong the second one the wrong

Answer 2

Answer:

Option D

Step-by-step explanation:

Given:-

If x=-y and y>0 means y is positive

now

A)x²y

=>(-y)²y

=>y³

since y is positive then y³ is also positive

y³>0 is true

B)x+y

=>-y+y

=>0

x+y=0 is true

C)xy

=>(-y)(y)

=>-y²

since y >0 then y²>0 and -y<0

so xy<0 is true

D)1/x-1/y

=>(1/-y)-(1/y)

=>-1/y-1/y

=>-2/y<0

since y is positive 1/y is positive but -1/y is negative

so 1/x-1/y <0 but given 1/x-1/y=0 is wrong

1/x-1/y =0 is not true