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3 years ago

The domain of the function given below is the set of all real numbers f(x)=1/2^x true or false?

Mathematics

2 answers:

Furkat [3]3 years ago

3 0

True. The domain of the function gives all real numbers.

MrRa [10]3 years ago

3 0

Answer:

it's false for apex

Step-by-step explanation:

the domain of the function given below is the set of all real numbers greater than 1

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melomori [17]

Answer:

Step-by-step explanation:

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3 years ago

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How do I factor (x^2 + 1)^1/2 +2(x^2 + 1)^1/2

professor190 [17]

$(x^{2} + 1)^{ \frac{1}{2}} + 2((x^{2} + 1)^{ -\frac{1}{2}}) \\\\ Take \ out \ (x^{2} + 1)^{ \frac{1}{2}} \ like \ so: \\\\ (x^{2} + 1)^{ \frac{1}{2}}(1 + 2(x^{2} + 1)^{ -1}) \\\\ = (x^{2} + 1)^{ \frac{1}{2}}(1 + \frac{2}{(x^{2} \ + \ 1)}) \\\\ = (x^{2} + 1)^{ \frac{1}{2}}(\frac{2 \ + \ (x^{2} \ + \ 1)}{(x^{2} \ + \ 1)}) \\\\ = (x^{2} + 1)^{ \frac{1}{2}}(\frac{(x^{2} \ + \ 3)}{(x^{2} \ + \ 1)}) \\\\ = \frac{(x^{2} \ + \ 1)^{ \frac{1}{2}}(x^{2} \ + \ 3)}{(x^{2} \ + \ 1)} \\\\$
This is what I would think to do with such an expression;
It should be alright to leave it as it is on the last line as this should be its simplest form;
But, you could write it out as:
$\frac{(x^{2} \ + \ 3)}{(x^{2} \ + \ 1)^{ \frac{1}{2}}} \\\\
= \frac{(x^{2} \ + \ 3)}{ \sqrt{(x^{2} \ + \ 1)}}$

5 0

3 years ago

Abby is half as old as her dad,and twice as old as her brother. If her brother is 9 years old,how old is her dad?

azamat

Well if Abby is twice the age of her bother and her brother is 9 then she is going to be 18 because 9x2=18, then it says that she is half her dads age so all you have to do is add 18+18 which equals 36

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4 years ago

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Leona [35]

Answer:

Step-by-step explanation:

-2.5 + 5n - 1.5n

-2.5 + 3.5n

Option B is the correct answer

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3 years ago

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What is the expanded form of 84.22

Ira Lisetskai [31]

Answer:

80 + 4 + 2/10 or 0.2 + 2/100 or 0.02. When I wrote the fractions, it really depends on what your teacher taught you to do.

Step-by-step explanation:

8 x 10 + 4 x 1 + 2 x 1/10 + 2 x 1/00

That is just the explanation for the equation.

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3 years ago