Answer:
(a) an = 18 +3(n -1)
(b) row 35
Step-by-step explanation:
(a) The general term (an) of an arithmetic sequence can be expressed in terms of the first term (a1) and the common difference (d) as ...
an = a1 +d(n -1)
The given sequence has a1 = 18 and d = 3, so the explicit formula is ...
an = 18 + 3(n -1)
__
(b) We want to find n such that an = 120.
120 = 18 + 3(n -1)
40 = 6 + n - 1 . . . . . . . divide by 3
35 = n . . . . . . . . . . . . . subtract 5
Row 35 has 120 seats.
D)2401
7^4=7^2×7^2=49×49=2401
B would be the correct answer
Decreasing order - highest strength of gravity to the lowest strength of gravity?
Jupiter 333 , Neptune 159 , Venus 128 , Mars 53
√0.25 = 0.5
-√16 = -4
both are rational
