Step-by-step explanation:
<u>Step 1: Add 2cos(x) to both sides</u>
<u>Step 2: Subtract 9 from both sides</u>
<u>Step 3: Divide both sides by 9</u>
<u>Step 4: Find x</u>
Answer:
Ok can someone please help me? i really need help and no one will help me, its easy middle school math
1 answer:
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Answer:
See Below.
Step-by-step explanation:
By the definition of the logarithm, if we have:
This means that we have some value <em>y</em> such that:
If <em>x</em> is -8, then:
As you can see,<em> </em>there is no real value* that can make the result negative. No matter what the value of <em>y</em> is, we will simply get another positive value.
So, -8 or any other negative value or zero is not included in our domain. 0 is not included because, likewise, we can’t raise 2 to a power and get 0 as a result.
*There is no <em>real</em> value for which 2 raised to <em>y</em> is -8. However, as you will learn much much later, there are in fact <em>infinitely</em> many <em>complex </em>(imaginary) solutions such that 2 raised to <em>y </em>is indeed -8.