Question

solve the three questions no.11,12,13​

Answer 1

Answer is in the attachment.

Answer 2

Answer:

11. 17 power -1 should be added to get 9 power -1.

13. x= 5/2

5 power (2 x -1)divided by 25=125

5 power( 2 x- 1) divided by 5 power 2 is equal to 5 power 3.

here ,5 is i same in iall the three cases. so, 2 x - 1 divided by 2 is equal to 3.

2x-1= 3 × 2

2x=6 - 1

x=5 ÷ 2

x=5/2....