Answer:
Tn = 4(-6)^n-1
Step-by-step explanation:
Write an explicit formula for an, the nth term of the sequence 4, -24, 144, ....
The sequence is a geometric sequence
Tn = ar^n-1
a is the first term
a = 4
r = -24/4 =144/-24
r = -6
Substitute
your answer letter is C.
7 + x + 4y
(7 + x) + 4y
x + (7 + 4y)
the sum of elements does not change, no matter the order.
Answer: the answer is 7