how many terms are there in the sequence 3,6,9,12.......11
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Step-by-step explanation:
a= 3
d=a2-a1 =6-3=3
an=11
n=?
an=a+(n-1)d
11=3+(n-1)3
11=3+3n-3
11=3n
n=11/3
you can check it
an= a+(n-1)d
11=3+(11/3-1)3
11=3+(8/3)3
11=8+3
11=11
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