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2 years ago

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Help. what is the inverse of:. y = (e^x)/(1+7e^x). . I got:. y = (e^x)/(1+7e^x). x = (e^y) / (1 + 7e^y). x + 7xe^y = e^y. x = e^

y - 7xe^y. x = (e^y)(1 - 7x). (x)/(1 - 7x) = e^y. . How would I bring down the y?. Thank you.

1 answer:

mezya [45]2 years ago

7 0

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Answer:

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Step-by-step explanation:

A multiple of a number is obtained after multiplying the number by an integer.

Here,

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(1) We have,

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∴ x is a multiple of y.

Thus, statement (1) ALONE is sufficient.

(2),

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I.e.

$y\times a = x^2-x$ , where a is an integer,

$\implies y\times a = x(x-1)$

∵ x and x - 1 are disjoint numbers,

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Case 1 : x is multiple of y

Case 2 : (x-1) is a multiple of y,

Case 3 : neither x nor x - 1 are multiple of y but their product is multiple of y,

Thus, statement (2) is not sufficient.

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Answer:

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