Question

plz help me in answering these questions!!!

Answer 1

(a)x= 4

(b) I don't know

Answer 2

Answer:

(7/9)^8 × (9/7)^-4 = (7/9)^3x

Step by step explanation :

(7/9)^8×(9/7)^-4 = (7/9)^3x

(7/9)^8 × (7/9)^4 = (7/9)^3x

To make the exponent positive we need to reciprocate the base i.e., (9/7)^-4. So, we will get (7/9)^4.

Now we will add the exponents on the left hang side as the bases are same =

(7/9)^8+^4 = (7/9)^3x

(7/9)^12 = (7/9)^3x

As the bases are same on both the sides so we will take the exponents only and ignore the bases =

12 = 3x

12/3 = x ( side changes sign changes)

4 = x

Hope it will help.....