- #1

alliereid

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I'm not suppose to use a calculator for this question, I tried taking the log of both sides but it required a calculator usage. Anyone know how to do this question by hand? The answer's -4 by the way

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- Thread starter alliereid
- Start date

- #1

alliereid

- 18

- 0

I'm not suppose to use a calculator for this question, I tried taking the log of both sides but it required a calculator usage. Anyone know how to do this question by hand? The answer's -4 by the way

- #2

Dick

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- #3

alliereid

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- #4

Dick

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- #5

alliereid

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Oh I'm sorry, you are right the answer is 4, I confused the answer I got which was -4 with the real answer. Yeah what I don't get is why it is 4, I got -4. It's a multiple choice question:

A. y = 4

B. x = 3

C. x = -3

D. y = -4

A. y = 4

B. x = 3

C. x = -3

D. y = -4

Last edited:

- #6

Dick

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Then how did you get -4?

- #7

alliereid

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y = 2^(x+3) + 4

log2y = (x+3)+4

So does that not mean that y can't equal negative 4 since logs can't have a negative?

- #8

Dick

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- #9

alliereid

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- #10

Dick

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- #11

alliereid

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Alright, thanks for your help.

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