InterviewSolution
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InterviewSolution
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If the common difference of an A.P is 3 , then a20 - a15 is |
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Answer» a=99 , a20=156 , a15=144 Therefor a20-a15= 15 15 It is given that Common deference (D=3) We know that, An=a+(n-1)d Now, a20-a15=a+(20-1)3-a-(15-1)3=a+19×3-a-14×3 =57-42=15 15 |
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