4(picture) convergent and divergent series

Option b is correct.

Divergent

Comparison Test:

Let for all n.

If converges, then   converges.

If   diverges, then   is also diverges.

Given the series

⇒ for all natural number n.

or

Note that: for all natural number n.

then;

or

Geometric series:

if , then the series is convergent.

if then the series is divergent.

then;

by geometric series,   it diverges as r > 1.

By comparison test:

diverges.

Therefore, the given series  is divergent.

b

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

brainliest

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh