22. If 3 + k , 18 – k , 5 + k are in A.P., then find k
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Answer:
k=7
answer and explanation given in picture
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Answer:
3 + k , 18 – k , 5 + k......
are in A.P.
a=3+k,d=18-k-3+k=....
formula used is...
An=a+(n-1)d.....
....
and solve it
Step-by-step explanation:
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