Question

Find the 19th term of an AP -11, -15, -19……….please help me...​

Answer 1

Answer:

AP19= -47

Step-by-step explanation:

AP19= -11 + (19-1)-2

AP19= -11+ (18)(-2)

AP19= -11+(-36)

AP19 = -47

Answer 2

Answer:

$\huge\star\underbrace{\mathtt\red{⫷❥ᴀ᭄} \mathtt\green{n~ }\mathtt\blue{ §} \mathtt\purple{₩}\mathtt\orange{Σ} \mathtt\pink{R⫸}}\star\:$

Step-by-step explanation:

$\huge\underline{Given<strong><em>→</em></strong>}$

→A.P=>-11,-15,-19,.........

→a=>-11(first term)

→d=>-4(common difference).

☆Obtained from b-a=>-15-(-11)

=>-15+11

=>-4.

$\huge\underline{ToFind<strong><em>→</em></strong>}$

Nineteenth term=>19th them.

So n=19.

$\huge\underline{Answer<strong><em>→</em></strong>}$

☆As a+(n-1)d=an.

So 19th term=>a+(18)d (19-1=18)

=>a+(18)d

=>-11+(18)-4

=>-11+(-72)

=>-11-72

=>-83.

☞So the nineteenth term(19th) of the given A.P is -83 which is the required answer.

HOPE IT HELPS.