Question

The first two terms of an arithmetic sequences are 7 and 3.

1.1.1 determine the eighteen term.

1.1.2 which term of the sequences Will be equal to -157?


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Answer 1

1.1.1) -61

1.1.2) Term 42

Explanation:

Tn= dn (difference) + t0 (term 0)

Tn= -4n+ 11

You can now take this general rule to find out the other terms.

Tn= -4(18)+11

Tn= -61

And the term -157

Tn= -4n+11

-157= -4n + 11

-157 - 11= - 4n

-168= -4n

-168/-4= n

42= n