Determine whether the sequence is arithmetio.
an = 9n2+ 3
A) Arithmetic
B) Not arithmetic

B.

Step-by-step explanation:

If n = 1 ,  a1 = 9^1^2 +3 = 12

a2 = 9*2^2 + 3 = 39

a3 = 9*3^2 + 3 = 84

The differences are 39 - 12 = 27 and 84 - 39 = 45   so it is not arithmetic as an arithmetic series ad a common difference.

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

two data sets with the same median will not have the same varaibility

step-by-step explanation: