eila3601
12.03.2020 •
Mathematics
Find the 61st term of the arithmetic sequence
−
12
,
−
28
,
−
44
,
.
.
.
−12,−28,−44,...
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Ответ:
Step-by-step explanation:
hello :
a(n) -a(n-1) = -16 (common differnce for arithmetic sequence)
-44-(-28) = (-28)-(-12) = -16
the ni-eme term is : a(n) = a(1) +(n-1)d d = -16 and a(1) = -12
so : a(n) = -12 +(n-1)(-16)
a(n) = -16n+4
continue for 61st term n =
when : n= ? a(?) = -16(?)+3 =
Ответ: