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Mathematics 16 Online
OpenStudy (anonymous):

Find the 20th number of this pattern 20,30,40

OpenStudy (anonymous):

Do you see the relation between these numbers?

OpenStudy (anonymous):

10s

OpenStudy (anonymous):

+ 10, actually! Yep, then what formula should we use?

OpenStudy (anonymous):

Arithmetic can u also do 10x20

OpenStudy (anonymous):

What formula to find the nth element?

OpenStudy (anonymous):

Idk

OpenStudy (anonymous):

We can't, because it's accumulated! not just add up!

OpenStudy (anonymous):

nth- element a_n = a_1 + ( n -1 ) d Do you know d?

OpenStudy (anonymous):

different d is? ...

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