Question

find 15th term of the series 1, 1/2 ,0 ,-1/2....

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Answer 1

Answer: we can write a 15

A plus n minus one ×d

A plus and minus 14 d

a+14d

a=1

d=a2-a1

d=1/2-1

d=1/2-2/2

d=-1/2

=:-. a+14d

1+14×-1/2

1-14/2.

2-14/2

-12/2

-6answer

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Answer 2

Answer:

-6 ans.

Step-by-step explanation:

Given :

a=1

d=-1/2

an=a+(n-1)d

a15=1+(15-1)×-1/2

=1+14×-1/2

=1-7

=-6 ans.

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