Question

in an arithmetic progression -3,-1/2,2___4 find n​

Answer 1

Answer:

4 is not the term is AP

Step-by-step explanation:

Let a be the first term and d be the common difference.

a = -3

d = 5/2

4= -3 - 5/2 + 5/2n

4 + 1/2 = -5/2n

n= 19/5

so 4 is not the term of AP.

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Answer 2

Step-by-step explanation:

a = -3

d = -1/2-(-3) = 5/2

Tn = a + (n-1)d

4 = -3 + (n-1) 5/2

4 = -3 + 5n/2 - 5/2

4 = (-6 + 5n -5) / 2

4×2 = (-6 + 5n -5)

8 = -11 + 5n

5n = 19

n = 19/5

n can't be in fraction.

Hence, 4 is not yet term of this series.