Answer:
1+11+21+31
Step-by-step explanation:
A sequence is a list of numbers separated by commas (for example: 1, 2, 3, …). A series is a sum of numbers separated by plus signs (for example: 1 + 2 + 3 + …)
i'm sorry if this is wrong.
Answer:
x=sqrt(y+2), -sqrt(y+2)
Step-by-step explanation:
y=x^2-2
x^2=y+2
x=sqrt(y+2), -sqrt(y+2)
Answer: 4 pi
Step-by-step explanation: