Tell whether the sequence below is arithmetic if it is whats the common difference 2, 7, 13, 20? i need !

the Answer is no the sequence is not arithmetic  

Step-by-step explanation:

the sequence 2, 7, 13, 20 is not have a number in common here i will show you.

try adding 2 plus 5 you get 7 but you add 5 to7 you do not get 13 you get 12 so that is not the number in common.

now try 2 plus 6 you get 8 so that is not it

now try 2 plus 2 you get 4 so that is not it

so all that is left is the sequence is not arithmetic.  Your Welcome

< 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⭐