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x^12=2^18

what is x ?

 Sep 26, 2014

Best Answer 

 #1
avatar+23247 
+5

Since you have x^12, take the 12th root of each side:

(x^12) ^ (1/12) = (2^18) ^ (1/12)

When you have an exponent to an exponent (a power to a power), multiply them:

     12 * 1/12 = 1         and          18 * 1/12 = 18/12 = 3/2 = 1 + 1/2

So, you get: x^1 = 2^(3/2)     which is x = 2^(3/2) = 2√2.

 

How to reduce: 2^(3/2):

2^(3/2) = 2^(1 + 1/2)

To multiply numbers with the same base, you add their exponents; also, if you have a problem with exponents are added, the problem can be split into two numbers that are added.

So, 2^(1 + 1/2) = (2^1) · (2 ^ (1/2) )

2^1 = 2         and         2 ^ (1/2) = √2

The final answer is x = 2√2.

 Sep 26, 2014
 #1
avatar+23247 
+5
Best Answer

Since you have x^12, take the 12th root of each side:

(x^12) ^ (1/12) = (2^18) ^ (1/12)

When you have an exponent to an exponent (a power to a power), multiply them:

     12 * 1/12 = 1         and          18 * 1/12 = 18/12 = 3/2 = 1 + 1/2

So, you get: x^1 = 2^(3/2)     which is x = 2^(3/2) = 2√2.

 

How to reduce: 2^(3/2):

2^(3/2) = 2^(1 + 1/2)

To multiply numbers with the same base, you add their exponents; also, if you have a problem with exponents are added, the problem can be split into two numbers that are added.

So, 2^(1 + 1/2) = (2^1) · (2 ^ (1/2) )

2^1 = 2         and         2 ^ (1/2) = √2

The final answer is x = 2√2.

geno3141 Sep 26, 2014

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