Question

Find k so that 15 ,k, -1are in ap

Answer 1

Answer:

a=15,a2=k,a3= -1

a2-a=a3-a2

k-15= -1-k

k+k= -1+15

2k=14

k=14/2

k=7

I hope you understand

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Answer 2

Answer:

I hope help u.......!!!!!!