Question

tim x:

               5^x+3 -13=612

 

Answer 1

5^{x + 3} - 13 = 612

= 5^x x 5³ - 13 = 612

= 5^x x 5³ = 612 - 13

= 5^x x 5³ = 598 

= 5^x x 125 = 598

= 5^x = 598 : 125  

nhé !

Answer 2

5^x+3 - 13 = 612

5^x+3           = 612 + 13

5^x+3           = 625

5^x x 5³      = 625

5^x x 125   = 625

5^x           = 625 : 125

5^x          =     5

Vậy x = 5

Answer 3

\(5^{x+3}-13=612\)

\(=5^x.5^3-13=612\)

\(=5^x.5^3=612-13\)

\(=5^x.5^3=598\)

\(5^x.125=598\)

\(=5^x=598\div125\)

\(5^x=4,784\)

............

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Answer 4

5^x+3 -13 =612

5^x+3      =612+13

5^x+3      =625

5^{x+3        =}5⁴

Suy ra :            x  là :   4 - 3 =1

Vậy số cần tìm là : 5¹ hoặc 5

Answer 5

cau tra loi cua minh la:

   5^x+3 -13= 612

   5^x+3       = 612+ 13

   5^x+3      =625

   5^x+3     = 5^{x  .} 5³

   5^{x +3}     =5^x . 125=625

=> 5^x       = 625 :125

   x        = 5

=>   5^x   = 5.      VAY: x= 1.

 k cho minh nhe!!!!!!!!!!!!!!!!!!!

Answer 6

dap an la 1 

Answer 7

d/s: 1