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Mathematics: Post your doubts here!

ahmadumar

ahmadumar

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so now here goes the explanation. be careful guys :D
arithmetic series is to be used if there is addition or subtraction in the sequence :)
Under arithmetic: the one on left is used to find any term. and the one on right is used to find sum of terms. :)
So, the one on the right side, "a" means the first term and "d" means the difference. how to find d is by finding difference between two consecutive terms. For example, d=T3 - T2, big one should come first :)

Now comes the geometric series. this is to be used if the sequence goes on with multiplication or division. :)
Here, "a" is the first term, and "r" is the common ratio (same as difference but not difference). To find "r" u need to divide two consecutive terms. For example, common ratio(r)= T3/T2 or T2/T1 NOT! T4/T1!! so use this where possible.


Now, an example for arithmetic series is : 1,3,5,7,9,11......... another example: 34, 30,26,22,18,14..... in these, there is addition or subtraction..

An example of geometric series: 1,4,16,64,256.... another example: 1/2, 1/4, 1/8, 1/16,..... in these there is multiplication or division :D
Hope u get it o_O:rolleyes::sick::whistle:
 
M

My Name

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ahmadumar said:
so now here goes the explanation. be careful guys :D
arithmetic series is to be used if there is addition or subtraction in the sequence :)
Under arithmetic: the one on left is used to find any term. and the one on right is used to find sum of terms. :)
So, the one on the right side, "a" means the first term and "d" means the difference. how to find d is by finding difference between two consecutive terms. For example, d=T3 - T2, big one should come first :)

Now comes the geometric series. this is to be used if the sequence goes on with multiplication or division. :)
Here, "a" is the first term, and "r" is the common ratio (same as difference but not difference). To find "r" u need to divide two consecutive terms. For example, common ratio(r)= T3/T2 or T2/T1 NOT! T4/T1!! so use this where possible.


Now, an example for arithmetic series is : 1,3,5,7,9,11......... another example: 34, 30,26,22,18,14..... in these, there is addition or subtraction..

An example of geometric series: 1,4,16,64,256.... another example: 1/2, 1/4, 1/8, 1/16,..... in these there is multiplication or division :D
Hope u get it o_O:rolleyes::sick::whistle:
Click to expand...
THANKS ALOT!!!
I do get it THANk god i have to learn only two of them!!
ITS cryatal clear!
 
S

shoaib672002

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The very common incorrect
answer of 480 betrayed a lack of understanding that the distance travelled is the area under the v-t graph
down to the time axis. If u only found the area of the triangle under the graph down to the truck
line. then its wrong
The other major error was to use distance = speed x time which, of course, only applies to constant speed.

Answer 960
 
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