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3 votes
3 votes
Can someone teach me how to do this?

Can someone teach me how to do this?-example-1
User Dave Draper
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1 Answer

11 votes
11 votes

the formula is a_{1}+(n-1) d

so a_{1} would be the first number in the sequence, which would be 13 in problem 9.

13+(n-1)d

then you put in n, which is 10 (it represents which number in the sequence you're looking for, for example 16 is the second number in the sequence)

13+(10-1)d

then you find the difference between each number, represented by d which in this case is 3

13+(10-1)3

13+(9)3

13+27=

40

User Ahbou
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2.9k points