Which Term Of Arithmetic Sequence Is -18,Given That A1 = 18 And A2 =2

Which term of arithmetic sequence is -18,given that a1 = 18 and a2 =2

 

Answer:

n=13/4

Step-by-step explanation:

an=-18

a1=18

a2=2

d=-16

an=a1+(n-1)d

-18=18+(n-1)-16

−18=18−16n+16

−18=−16n+34

−16n=−52

n=13/4

Checking

18+((13/4)−1)(−16) =-18

-18=18+9/4(−16)

-18=18−36

-18=−18

√

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