B a negative and a negative is a positive
<span>(2+7i)+(-7+8i)
=</span><span>2+7i -7+8i
= -5 + 15i</span>
Answer:
Step-by-step explanation:
You can't solve for the values of a and b because 6a³b²·2a⁴b³ is an expression, not an equation. However, you can simplify the expression:
6a³b²·2a⁴b³ = 6·2·a³⁺⁴b²⁺³ = 12a⁷b⁵
You line up the numbers shown in the photo, then add each column
Answer:
a(n) = 1(2.5)^(n - 1)
Step-by-step explanation:
The geometric sequence is 1, 2.5, 6.25, 15.625, and so on; the first term is 1. The common ratio is 2.5; each new term is 2.5 times the previous term.
The explicit formula desired is thus a(n) = 1(2.5)^(n - 1)