1. analyze the following pattern: 1, 2, 5, 10, 17,

34 is next

Step-by-step explanation:

an+1=an+2n-1, a1=1

a8=50

Step-by-step explanation:

1+1=2

2+3=5

5+5=10

10+7=17

We are adding the nth term by 2n-1 to get the (n+1)th term.

< 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⭐