3 years ago

The 12th term of an arithmetic sequence is 36, and the common difference is 3. What is the first term of the sequence?

Mathematics

2 answers:

vesna_86 [32]3 years ago

7 0

The answer is c on edgunity

Arisa [49]3 years ago

3 0

An=a1+d(n-1)
d=3
a12=36

a12=a1+3(12-1)
36=a1+3(11)
36=a1+33
minus 33 both sides
3=a3

C is answer

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