Question

ap is 5, -2, -1_ _ _ _ an = - 49 ​

Answer 1

Answer:

-49 is the 19th term of this AP.

Step-by-step explanation:

a = 5, d = 2 - 5 = -3, an = -49, n = ?

an = a + (n - 1)d

-49 = 5 + (n - 1)-3

-49 = 5 - 3n + 3

-57 = -3n

n = 19.

So -49 is the 19th term of this AP.

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Answer 2

Answer:

ans = 40

Step-by-step explanation:

Given series of AP:

−11,−8,−5,.......49

New series :

49,........−5,−8,−11

In new series of AP first term

a=49,

common difference d

=(−8)−(−5)=−3a4

=a+3d

=49+3(−3)

=49−9

=40