find the nth term of an arithmetic sequence
1.) an=a1+(n-1) d.
find the 18th term of
2.) 5,12,19...
find the 20th term of
3.)1,4,7,...
find the 23th term if
a1= -2 and d =4
4.)give the 5 terms if the first term is 8 and the last term is 100.
please answer thankyou.
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Step-by-step explanation:
2. a18=5+(18-1)7
a18=5+(17)7
a18=5+119
a18=124
3.a20=1+(20-1)3
a20=1+(19)3
a20=1+57
a20=58
4.a23=-2+(23-1)4
a23=-2+(22)4
a23=-2+88
a23=86