A friend says that the recursive formula for the geometric sequence $1,-1,1,-1,1,is an+1x(-1)^n-1. Explain your friend's error and give the correct recursive formula for the sequence.

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.

8 apples are left.

step-by-step explanation:

10-2=8

10 apples

take 2

now u have 8

just needed some points but try socratic