Mathematics: Post your doubts here!

[A star]

Lets hope our marks are just as high

i wish i had a double like option

 

[daredevil]

okay ppl listen up

do Q8 from this one -__-
i'm dead exhausted and can't solve it so help :O

 

[daredevil]

okay ppl listen up

do Q8 from this one -__-
i'm dead exhausted and can't solve it so help :O

A star

 

[A star]

okay ppl listen up

do Q8 from this one -__-
i'm dead exhausted and can't solve it so help :O

ok here goes nothing
1 on first day the amount donated is 5/100 *1000= 50
on second day the amount donated is 5/100 *2000=100 hence we can see that d=50 a=50 now use formulae S40=40/2(100 + (39)50) =40000

 

[A star]

A star

takes time typing

 

[asd]

okay ppl listen up

do Q8 from this one -__-
i'm dead exhausted and can't solve it so help :O

I solved it just yesterday.
Now write down the numbers for the first model: they are going to be 1000,2000,3000,...
5 percent donated everyday, 50,100,150.
first term is 50, common difference is 50.
solve for the sum of 40 terms. you get 41000
For the second model, do the same. 1000,1100,1210,1331...
r= 1.1
S40=1000(r^40-1)/(r-1)
what ever you get just take the 5 percent of that.

 

[A star]

I solved it just yesterday.
Now write down the numbers for the first model: they are going to be 1000,2000,3000,...
5 percent donated everyday, 50,100,150.
first term is 50, common difference is 50.
solve for the sum of 40 terms. you get 41000
For the second model, do the same. 1000,1100,1210,1331...
r= 1.1
S40=1000(r^40-1)/(r-1)
what ever you get just take the 5 percent of that.

got it was using a instead of 2a

 

[ZainH]

i am getting 40000

It's 41000, the calculations you wrote are correct. You probably did a mistake while calculating it.

 

[asd]

i am getting 40000

Im getting 41000. even by solving what YOU typed up there.

 

[A star]

i wrote 10o over there and put in calculator i dont know how it happens
asd daredevil i dont gety it happens

 

[asd]

i wrote 10o over there and put in calculator i dont know how it happens
asd daredevil i dont gety it happens

Shit happens dude
Just make sure it doesnt tomorrow.

 

[Rutzaba]

syed 1996 panda
http://i1275.photobucket.com/albums/y444/Rutzaba/rutaba_zps3cbb8530.png

 

[A star]

awes

syed 1996 panda
http://i1275.photobucket.com/albums/y444/Rutzaba/rutaba_zps3cbb8530.png

ome job

 

[ZainH]

Shit happens dude
Just make sure it doesnt tomorrow.

Exactly lol, emphasis on TOMORROW.

 

[asd]

Exactly lol, emphasis on TOMORROW.

TOMORROW*
there you go.

 

[Just visiting]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w10_qp_12.pdf

There's a problem in 6(i) right?

can you tell me how to make Q7 iii pls

 

[ZainH]

Q. A geometric progression has the first term 4, and common ration (2x-3) , find the set of values of x for which the geometric progression has a sum to infinity.

How ?

 

[A star]

Q. A geometric progression has the first term 4, and common ration (2x-3) , find the set of values of x for which the geometric progression has a sum to infinity.

How ?

easy 2x-3<1
2x<4
x<2

 

[daredevil]

Q. A geometric progression has the first term 4, and common ration (2x-3) , find the set of values of x for which the geometric progression has a sum to infinity.

How ?

r<1 if sum to infinity exists
solve this inequality using the vlaue of r u have : - (2x-3) and u'll get ur range... i think

 

[A star]

guys i need some dif questions please dont send easy ones ( NO OFFENCE MEANT)