6th term of ap is zero. Prove that it's 21st terms is triple its 11th term
Answers
Answered by
250
First term = a
Common diff. = d
6th term = a + 5d
a + 5d = 0
a = -5d
21st term = a + 20d = -5d + 20d = 15d
11th term = a + 10d = -5d + 10d = 5d
Therefore,
21st term = 3 * 11th term = 3 * 5d = 15d (proved)
Common diff. = d
6th term = a + 5d
a + 5d = 0
a = -5d
21st term = a + 20d = -5d + 20d = 15d
11th term = a + 10d = -5d + 10d = 5d
Therefore,
21st term = 3 * 11th term = 3 * 5d = 15d (proved)
Answered by
19
Answer:
HOPE IT HELPS YOU BRO THE ANSWER IS IN THE IMAGE♂
Attachments:
Similar questions