The sum of first 11 term of an arithmetic sequence is 253 and the sum of first 12 terms is 300.
(a) What is the 6th term?
(b) What is the 12th term?
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5
Answer:
23 and 47
Step-by-step explanation:
12th term = sum of 12th terms -sum of 11 terms
= 300-253
=47
so 11th terms sum = 11/2*(2a+10d)= 253
=11(a+5d)= 253
a+5d= 23
so 6th term is 23
hope you understood
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