Find the common difference of an A.P . Who’s first term is 5 and the sum of its first 4 terms is half the sum of the next 4 terms
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Step-by-step explanation:
Let the common difference =d
First 4 terms-5, 5+d, 5+2d, 5+3d
Next 4 terms-5+4d, 5+5d, 5+6d, 5+7d
According to the question-
=5+5+d+5+2d+5+3d=5+4d+5+5d+5+6d+5+7d
2
=20+6d=22d+20
2
=40+12d=22d+20
=20=10d
d=2
Hence, common difference of A.P. is 2.
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