it should be the third one
7x+7b = 7(x+b)
..............
Hello,
x+iy=3-2i-2+3i
x+iy=1+i
x=1
y=1
Answer:

Step-by-step explanation:
The series is an arithmetic series with first term (a1) -9 and common difference (d) 5. Then the general term (an) is ...
an = a1 +d(n-1) = -9 +5(n-1) = -14 +5n
The summation notation indicates the sum of "n" of these terms.
Answer:
In mathematics, a rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number. The set of all rational numbers, often referred to as "the rationals", the field of ... The decimal expansion of a rational number either terminates after a finite
Step-by-step explanation: