find 15 term of AP 21, 16 ,11 ,6
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2
Answer:
a=21
d=16-21=-5
a+14d=21-70
= -49
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( 16-21) = (11-16) = ( 6-110 = ( 1-6) = -5 , which is constant . So, the given progression is an AP. Let its nth term be -54...
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