Math, asked by georaj9839, 10 months ago

9 power x + 9 power x-1 = 90

Answers

Answered by sweetyheree
5

Step-by-step explanation:

 {9}^{x}  +  {9}^{x - 1}  = 90

 {9}^{x} (1 +  \frac{1}{9} ) = 90

 {9}^{x}  \times  \frac{10}{9}  = 90

 {9}^{x}  = 81

9²=81

so compare

 {9}^{x}  =  {9}^{2}

x=2

(◍•ᴗ•◍)

Answered by adityasinghal62
0

Answer:

x=9. is the answer

Step-by-step explanation:

hope you like the answer

Attachments:
Similar questions