[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 2 KB, 282x114, whatdoido.png [View same] [iqdb] [saucenao] [google]
5658689 No.5658689 [Reply] [Original]

Do the 5's cancel out here to just give me log?

>> No.5658692

thats not a .5 btw

>> No.5658693

>>5658689
I wat'd

no

>> No.5658703

>>5658693
fuck
I dont know what to do with the 5 infront of the log.

>> No.5658708

>>5658703
it is 5*log(...) = 20

divide both sides by 5 dude

>> No.5658714

>>5658708
oh ok, thanks heh

>> No.5658727

Isn't <span class="math">\log_n x[/spoiler]
The inverse of <span class="math">n^x[/spoiler]
?

>> No.5658767
File: 37 KB, 498x614, 1331255830802.jpg [View same] [iqdb] [saucenao] [google]
5658767

>>5658689
>>5658714

>> No.5658893
File: 7 KB, 278x190, logarithm.png [View same] [iqdb] [saucenao] [google]
5658893

<span class="math">5 \log_5(7-x) = 20[/spoiler]
<span class="math">\log_5(7-x) = 4[/spoiler]
<span class="math">5^4 = 7-x[/spoiler]
<span class="math">x = 7-5^4[/spoiler]
<span class="math">x=-618[/spoiler]

test:
<span class="math">5 \log_5(7-(-618)) = 5 \log_5(625) = 5 \cdot 4 = 20[/spoiler]

>> No.5658998

5^20 = (7-x)^5

>> No.5659017

>>5658998
The five in front of the log is just raising the thing above the base (sorry forgot its name) to that power.

>> No.5659015

>>5658893
fourth line should read <span class="math">x = (7-5)^4[/spoiler].
not trying to be pedantic, OP just might miss this.

>> No.5659041

>>5659015
that is wrong
it should not read that