In arithmetic sequence 9, 11, 13, 15, 17, ..., (a)write the formula for
the nth term, (b)find its 12th term, and (d)which term is 47?
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In arithmetic sequence 9, 11, 13, 15, 17, ..., (a)write the formula for
the nth term, (b)find its 12th term, and (d)which term is 47?
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Verified answer
Answer:
a. 2n+7
b. 31
c. 20th term
Step-by-step explanation:
Dun sa una wala nagisip lang ako ng pag sinubstitue ko yung 1 sa equation na yun 9 lalabas.
Sa pangalawa gamitin mo yung formula na nakuha. Substitute 12.
Sa pangatlo ganto
aₙ= a₁+(n-1)d aₙ=47;a₁=9;d=2
47= 9+(n-1)2
47-9=2n-2
38+2=2n
40=2n
n=20