AP/GP helppp (1 Viewer)

lolzlolz · Mar 3, 2022

can someone help me with this question please? thanks

ExtremelyBoredUser · Mar 3, 2022

lolzlolz said:
can someone help me with this question please? thanks

AM is just the sum of numbers divided by the amount of numbers summed;

AM = $\frac{x_{1} + x_{2} + ... + x_{n}}{n}$

Simply substitute whats given and the value of n and should be straightforward from there.

$5 = \frac{ (x-3) + (2x + 7)}{2}$
$10 = 3x + 4$
$3x = 6$
$x = 2$

lolzlolz · Mar 4, 2022

ExtremelyBoredUser said:
AM is just the sum of numbers divided by the amount of numbers summed;

AM = $\frac{x_{1} + x_{2} + ... + x_{n}}{n}$

Simply substitute whats given and the value of n and should be straightforward from there.

$5 = \frac{ (x-3) + (2x + 7)}{2}$
$10 = 3x + 4$
$3x = 6$
$x = 2$

thanks. how do you find the geometric means?

icycledough · Mar 4, 2022

With the geometric mean, you multiply the terms and equate the nth root, where n is the number of terms. So with your example, the equivalent equation would be (x - 3) * (2x + 7) = 5^2 = 25

ExtremelyBoredUser · Mar 4, 2022

lolzlolz said:
thanks. how do you find the geometric means?

GM formula is here;

, pretty much what is said above ^^

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