if 2x xx 8 1 5 2 then x is, Surds and Indices, General Mathematics

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Question:If $2^x xx 8^(1/5) = 2^(1/5)$  then x is equal to :

A  $1/5$  
B  $- 1/2$  
C  $2/5$  
D  $- 2/5$

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+ AnswerD

+ Explanation $2^x xx 8^(1/5) <=>(2^x xx 2^(3/5))/(2^(1/5)$ 

 $= 1 <=>2^x xx 2(3/5 - 1/5) = 1$ 

 $or 2(x + 2/5) = 2^0.$  So, $x + 2/5 = 0 or x = - 2/5$

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Question:If2x×815=215 2^x xx 8^(1/5) = 2^(1/5) then x is equal to :

A 151/5

B -12- 1/2

C 252/5

D -25 - 2/5

D

Question:If $2^x xx 8^(1/5) = 2^(1/5)$ then x is equal to :

A $1/5$

B $- 1/2$

C $2/5$

D $- 2/5$