যদি 125^(2x+3) = 5^(3x+6) হয়, তবে = কত?

A 0

B 1

C -1

D 4

Solution

Correct Answer: Option C

   125^(2x+3) = 5^(3x+6) 

=> 5^3(2x+3) = 5^3x+6 

  3(2x+3) = 3x + 6 

বা, 6x + 9 = 3x + 6 

বা, 6x - 3x = 6 - 9 

বা,  3x = -3 

      x = -1 

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