Question

If 3 + k, 18 - k, 5k + 1 are in A.P. then find k​

Answer 1

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If the following terms are in AP then the common difference between them is same..

So

a2-a1=a3-a2

18-k-3-k=5k+1-18+k

15-2k=6k-17

-2k-6k=-17-15

-8k=-32

so

k=4

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Answer 2

Answer:k = 4

Step-by-step explanation: