Answer:
595
Step-by-step explanation:
First term:
7
7
⋅
4
=
28
Second term:
28
28
⋅
4
=
112
Third term:
112
112
⋅
4
=
448
Fourth term:
448
This geometric sequence can be further described by the equation:
aₙ
=
7
⋅
4
ⁿ⁻¹
So if you want to find the 4th term, n
=
4
a
₄
= 7 ⋅ 4
⁴⁻¹ = 7 ⋅ 4
³ = 7 ⋅ 64 =
448
Note:
aₙ = a₁ rⁿ
⁻¹
