Question

If (x ,2 ) and(-2 ,y) are equal ,then value of x and y are *​

Answer 1

Answer:

7th

Maths

Algebraic Expressions

Finding the Value of an Expression

If x^y = y^x and x = 2y, th...

MATHS

If x

y

=y

x

and x = 2y, then find the value of x+y. (Assume that y



=0)

EASY

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ANSWER

We have,

x

y

=y

x

…….. (1)

And x=2y ……. (2)

On putting the value of xin equation (2), we get

(2y)

y

=y

2y

2

y

.y

y

=y

y

.y

y

y

y

=2

y

ylny=yln2

∴y=2

Therefore,

x=4

So,

x+y=4+2

x+y=6

Hence, this is the answer.

Step-by-step explanation:

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