Math, asked by sheemameethelakunnat, 1 month ago

The sum of 1st and 8th terms of an arithmetic sequence is 30 . Its 4th term is 10 .
Find the 5th term of the sequence .​

Answers

Answered by dkchakrabarty01
0

Answer:

a1+a8=30

a1+a1+7d=30

2a1+7d=30 equation 1

a4=a1+3d=10 equation 2

From equation 2 a1=10-3d

Put this value of a1 in equation 1

2(10-3d)+7d=30

20+d=30

d=10

a1=10-3×10=-20

a5=-20+4×10=20 Ans

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