The nth term of a sequence is 3n^2 +4.work out the third term of this sequence

1 answer:

3 0

N is the term that you are looking for. it asked for the 3rd term so you replace n with 3. now its : 3 x 3^2 + 4 . you use the order of PEMDAS:

P arenthesis
E xponents
M ultipication
D ivision
A ddition
S ubtraction

you start with parenthesis but there are none so now exponents. 3^2 is 3 x 3. that would be: 3 x 3 = 9.

now multiplication. 3 x 9 + 4. 3 x 9 = 27

now division. there is none. so now addition and there is. 27 + 4 = 31.

then subtraction but there is none. so now you are done.

the 3rd term is therefore 31.

i hope that i helped.

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