Question

3.5^x+2.5^x=5^6

Answer 1

\(3.5^x+2.5^x=5^6< =>\left(3+2\right).5^x=5^6< =>5.5^x=5^6< =>5^x=5^6:5< =>5^x=5^5< =>x=5\)

Answer 2

3.5^x+2.5^x=5⁶

(3+2).5^x=15625

5.5^x=15625

5^x=15625:5

5^x=3125

5^x=5⁵

x=5

Vậy x=5

Answer 3

3 . 5^x + 2 . 5^x = 5⁶ 

<=> 5^x . 5 = 15625

<=> 5^x = 3125 

=> x = 5 vì 5⁵ = 3125