Question

fine the value of x so that
explain it how​

Answer 1

Answer:

(i)x=4

(ii)x=1

Step-by-step explanation:

(i)

(3/4)2x+1=[(3/4)3]3

(3/4)2x+1=(3/4)9

as the co-efficient are same and a sign of equal in middle thus the power should also be same

so,2x+1=9

2x=9-1

2x=8

x=8/2

x=4

(ii)

(-1/5)20 divide (-1/5)15 =(-1/5)5x

(-1/5)20=(-1/5)5x *(-1/5)15

as the LHS terms are in multiplication the powers will add up

(-1/5)20=(-1/5)5x+15

As the co-efficient are same and a sign of equal in middle thus the power should also be same

20=5x+15

20-15=5x

5=5x

x=1