u alr know wat it is (1 Viewer)

jimmysmith560 · Jul 24, 2023

Assuming you need help with all parts of this question, would the following help?

Part (a):

$^8P_r=336\Rightarrow \frac{8!}{(8-r)!}=336$

$\therefore \frac{8!}{336}=(8-r)!=120$

$\text{Hence,} \ (8-r)!=120=5!$

$\text{So,} \ (8-r)=5 \Rightarrow r=3$

Part (b):

Part (c):

$\text{Using} \ ^nP_r=\frac{n!}{(n-r)!}$

(i)

(ii)

yolo tengo · Jul 24, 2023

jimmysmith560 said:
Assuming you need help with all parts of this question, would the following help?

Part (a):

$^8P_r=336\Rightarrow \frac{8!}{(8-r)!}=336$

$\therefore \frac{8!}{336}=(8-r)!=120$

$\text{Hence,} \ (8-r)!=120=5!$

$\text{So,} \ (8-r)=5 \Rightarrow r=3$

Part (b):

View attachment 39063

Part (c):

$\text{Using} \ ^nP_r=\frac{n!}{(n-r)!}$

(i)
View attachment 39064

(ii)
View attachment 39065

jimmy please where are you getting these

synthesisFR · Jul 24, 2023

yolo tengo said:
jimmy please where are you getting these

cambridge works sols? lol

yolo tengo · Jul 24, 2023

synthesisFR said:
cambridge works sols? lol

wait whaaaat??? the book does not have the working out n stuff, it’s just the answer present

synthesisFR · Jul 24, 2023

yolo tengo said:
wait whaaaat??? the book does not have the working out n stuff, it’s just the answer present

theres copies of the worked solns its separte to the book

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u alr know wat it is (1 Viewer)

yellowhighlighterr

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jimmysmith560

Le Phénix Trilingue

yolo tengo

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synthesisFR

afterhscivemostlybeentrollingdonttakeitsrsly

yolo tengo

Well-Known Member

synthesisFR

afterhscivemostlybeentrollingdonttakeitsrsly

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