You must add 6 to complete the square.
x^2+12x+(6)=-5(6)
It's A ...cos (90- theta) = sin theta
so A
To find if a series is either geometric or arithmetic:
it must satisfy this property:
Arithmetic:
a(n+1) - a(n) = const
Geometric:
a(n+1)/a(n) = const
In your case:
r1 = 7 -4 = 3
r2 = 12 - 7 = 5
r1 != r2 (not arirthmetic)
Geometric check:
r1 = 7/4
r2 = 12/7
r1 != r2 (not Geometric)
so neither.
Answer:
<h2>Sorry I couldn't find it.</h2>
Step-by-step explanation:
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