Maths, Addmaths and Statistics: Post your doubts here!

[Spidey21]

is there any formula to find nth term (in sequence) in math

the standard formula is a+(n-1)d
where a is the first term
n is the term your finding and
d is the difference

other formula is a+(n-1)d X 1/2(n-1)(n-2)c
where c is the second difference...

 

[Spidey21]

No i think u have to see the difference and then get an equation for the sequence by your self !



Nopes its not allowed its one of the rules of CIE which if u have the statement of entry now will be written on the back of it

dude what calculators are allowed...i got a pretty old model...:S

 

[Vogue]

the standard formula is a+(n-1)d
where a is the first term
n is the term your finding and
d is the difference

other formula is a+(n-1)d X 1/2(n-1)(n-2)c
where c is the second difference...

wat does second difference mean....will u plz explain it a little more

 

[scouserlfc]

wat does second difference mean....will u plz explain it a little more

I guess it means the difference between the 3 and 2 term !

 

[scouserlfc]

dude what calculators are allowed...i got a pretty old model...:S

What model do u have ,if its old i guess u are good !

 

[Spidey21]

What model do u have ,if its old i guess u are good !

fx 992s
dont know my brother used it like years back..

 

[Spidey21]

wat does second difference mean....will u plz explain it a little more

i can only do it with a sample question ..you just wait and i ll put it up asap!!

 

[Ahad96]

Can anyone provide with some useful stuff about statistics and especially cumulative frequency..

 

[scouserlfc]

fx 992s
dont know my brother used it like years back..

Well congrats u are good ! but your calculator is soo old ! but as you know old is gold

 

[Spidey21]

Well congrats u are good ! but your calculator is soo old ! but as you know old is gold

yeah i know it actually is going to turn into gold pretty soon!!

 

[Spidey21]

I got this list on another thread...wanted to share it with you guys
here ya go

AURORA
SC 550

FIAMO
SC 6
SC 20

CANON
F-715S

CASIO
FX 82AU
FX 82MS
FX 85MS
FX 95MS
FX 95 SG Plus
FX 350MS
FX 820MS
FX 992S

HEWLETT PACKARD
HP 8S
HP 9S
HP10S
HOSEKI
H-1030
H-1031

SHARP
EL 509VM
EL 509 W
EL 509WM
EL 509WS
EL 546VA
EL W531S

TEXAS INSTRUMENTS
TI 30XIIB
TI 30XIIS
TI 34 II​

 

[Spidey21]

*THESE ARE THE ALLOWED CALCULATORS!!

 

[nafis shahRiyar]

the standard formula is a+(n-1)d
where a is the first term
n is the term your finding and
d is the difference

other formula is a+(n-1)d X 1/2(n-1)(n-2)c
where c is the second difference...

The standard formula can only and ONLY be applied when the pattern of the sequence is uniformly increasing supposingly like 2,4,6,8.... but not for 2,5,7,11....the difference over here is not the same...

 

[convent2012]

4024 nov2006 paper2 9th question ??? can anybody help me ??

 

[Spidey21]

The standard formula can only and ONLY be applied when the pattern of the sequence is uniformly increasing supposingly like 2,4,6,8.... but not for 2,5,7,11....the difference over here is not the same...

yes you are right
for that i shared the other formula...
other formula is a+(n-1)d X 1/2(n-1)(n-2)c
where c is the second difference...

 

[Spidey21]

The standard formula can only and ONLY be applied when the pattern of the sequence is uniformly increasing supposingly like 2,4,6,8.... but not for 2,5,7,11....the difference over here is not the same...

please ppl you guys should read the post completely before commenting...

 

[Spidey21]

wat does second difference mean....will u plz explain it a little more

look, there are two kinds of patterns
one which have same increase all over like
1 , 3 , 5 , 7 etc now the difference here is 2...

the other type of pattern is

1, 5 ,13 , 25 ,etc over here the difference is increasing by four every time...so the increase in the difference or the difference of the difference is the 2nd difference...samajh aya??? i thought alot on it..if you still dont get it i will try to rephrase it....

 

[Spidey21]

4024 nov2006 paper2 9th question ??? can anybody help me ??

9(a) use the pythogoras..
(b) i, FAN is the angle of depression ( i think)
ii, Tan 25= (28.6+x)/100 (perpendicular upon base)
c (i) get BC by pythogoras using the triangle BAC , then sinx = 28.6/ your answer by pythogoras
(ii) use sin 10= 28.6/ DB to find DB and then use
Cos <DBA = BA/DB
tada you have your answers...

 

[Tharindu]

Is Casio fx 991 es allowed

 

[Spidey21]

I guess it means the difference between the 3 and 2 term !

correction, its the difference of the difference!!