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3 years ago

9/4,3/8,1/3 what is the least common denominator plz show work

Mathematics

2 answers:

Alexus [3.1K]3 years ago

7 0

4, 8, and 3 must all go into the number. find the LCM(4,8) is 8. the LCM(8,3) is 24. that's your answer, 24

Dmitrij [34]3 years ago

4 0

Analyze the 3 given denominators:

4 = 2*2

8 = 2*2*2

3 = 3

The three 2's that make up 8 are part of the LCD; the other part is the 3. Thus, your LCD is 24. Thus, 9/4= 54/24; 3/8 = 9/24; and 1/3 = 8/24.

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3 years ago

ln(y+1)-lny=1+3lnx . Express y in terms of x, in a form not involving logarithms. (4 marks, Maths CIE A level)

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$remember$
$ln(x)=log_e(x)$
$and$
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$and$
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$and$
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$minus$ $ln(x^3)$ $from$ $both$ $sides$

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$translate$

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$e=\frac{y+1}{yx^3}$

$times$ $both$ $sides$ $by$ $yx^3$

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$minus$ $y$ $from$ $both$ $sides$

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$divide$ $both$ $sides$ $by$ $(ex³-1)$

$y= \frac{1}{ex^3-1}$

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3 years ago

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