SOLUTION: Find x, 3333²ˣ + 3333⁴ˣ = 11112222

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Question 1207342: Find x,
3333²ˣ + 3333⁴ˣ = 11112222

Answer by ikleyn(52800)   (Show Source): You can put this solution on YOUR website!
.
Find x, 3333²ˣ + 3333⁴ˣ = 11112222.
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Let y =  be new variable. Then the given equation takes the form

    y^2 + y = 11112222.


Simplify and find y

    y^2 + y - 11112222 = 0.


Use the quadratic formula

    y =  = .


Since y =   is positive, we accept the positive root 

    x =  = 3333

and discard the negative root.


So,   = 3333;  hence,  2x = 1  and  x= 1/2 = 0.5.


ANSWER.  x = 1/2 = 0.5.

Solved.



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