Question

if
$9.5 {}^{x} = 0.95 {}^{y} = 1000$
then x/y - y/x =?

please answer it fasttt


​

Answer 1

Given that: n=10

∑x=50,∑y=−30

∑x

2

=290,∑y

2

=300,

∑xy=−115

Formula :

=

n∑x

2

−(∑x)

2

.

n.∑y

2

−(∑y)

2

n∑xy−∑x.∑y

r=

10×290−(50)

2

.

10×300−(−30)

2

[10×(−115)]−[50×(−30)]

=

2900−2500

.

3000−900

−1150+1500

=

400

.

2100

350

=

20×10

21

350

=

4

21

7

=0.381.

Answer 2

Given that: n=10

∑x=50,∑y=−30

∑x2=290,∑y2=300,

∑xy=−115

Formula :

=n∑x2−(∑x)2.

n.∑y2−(∑y)2

n∑xy−∑x.∑y

r=10×290−(50)2.10×300−(−30)

2[10×(−115)]−[50×(−30)]

=2900−2500.3000−900−1150+1500

=400.2100350

=20×10/21 ,350

=4217=0.381.

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