Question

find the vaule of x if 5^8 x 5^4 =5 ^x -1​

Answer 1

Answer:

5^8×5^4= 5^x-1

bases are equal exponents must be equal

8+4 = x-1

12 = x-1

x= 11.

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Answer 2

Answer:

5^8×5^4=5^x-1

5^12=5^x-1

12=x-1

x=13