The sum of first and 21st term of an arithmetic sequence is 140 what is the 11th term
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Answer:
the answer is 70.
Step-by-step explanation:
first term= a
21st term= a + 20d
11th term= a+ 10d-----------(1)
A.T.Q
a + a + 20d= 140
2a +20d= 140
2(a + 10d)= 2(70)
a + 10d= 70
hence the 11th term is 70
MARK AS BRAINLIEST
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