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abruzzese [7]
2 years ago
12

Help please

Mathematics
1 answer:
ad-work [718]2 years ago
5 0
Im pretty sure the answer is a
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Answer:

Step-by-step explanation:

3x2 - y2 = 9.........(1)

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Let x^2 = a and y^2 = b

:- the two equations becomes

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Substracting (3) from (5)

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2 years ago
Which statement is true about the domain of y = 3(2^-x)? Explain.
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We want to determine the domain of {y=3 \cdot 2^{-x}=3 \cdot ({2^{-1}})^x=3 \cdot ({ \frac{1}{2}})^x

any function of the form y=f(x)=a \cdot b^x is called an "exponential function",
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The domain of such functions is all real numbers.

That is for any x, the expression <span>3(2^-x) "makes sense".



Answer: </span><span>The domain is all real numbers</span>
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