the sum of the 4th and 12th term in a sequence is 20 write down the 8th term of the sequence
Answers
Answered by
1
Answer:
10
Step-by-step explanation:
4th term =a+3d
12th term =a+11d
Given 4th term +12th term =20
=a+3d+a+11d=20
=2a+14d=20
=2(a+7d)=20
=a+7d=10. -------eq--1
We know that 8th term is equal to a+7d
From[ eq 1] 8th term is 10
Hope you'll understand
Answered by
2
Step-by-step explanation:
4th term of sequence
a4 = a + 3d
12th term of sequence
a12 = a + 11d
sum of 4th and 12th term = 20
a + 3d + a + 11d = 20
2a + 14d = 20
2 (a + 7d) = 20
a + 7d = 20/2
a + 7d = 10
the 8th term of sequence = a8 = a + 7d
therefore the 8th term of sequence = 10
hope you get your answer
Similar questions