Question

simplify : solve 7 and 4

Answer 1

(X/Y)-n=(Y/x)+n
=2^2+3^2+4^2
=4+9+16
=29

Answer 2

Answer:

Step-by-step explanation:

4. Let , 1/2=x , 1/3=y, 1/4=z

Here we are given ,

X^-2+y^-2+z^-2 =1/(1/4)+1/(1/9)+1/(1/16)

= 4+9+16=29

7. Let, 2/5 is x and 3/4 is y

So, ( x^-1*y^-1 )^-1

And also consider (x^-1*y^-1) be z

So, (5/2)*(4/3)

(10/3) which is z^-1

So z^-1=1/z= 3/10