Sum of 4th and 8th term if an AP is 24 and the sum of 6th and 10th term is 34. Find the first term of an AP and the common difference.
AkshitGarg06:
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n4 = a + 3d
n8 = a + 7d
given is n4 + n8 = 24
Therefore 2a+10d=24 ...1
Similarly 2a+14d=34 ...2
Now solve 1 and 2 equation
n8 = a + 7d
given is n4 + n8 = 24
Therefore 2a+10d=24 ...1
Similarly 2a+14d=34 ...2
Now solve 1 and 2 equation
a=-1/2 d= 5/2
maybe check answer in ncert
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