Find the 20th term of the ap 7th term is24 less than the 11th term, first term being 12.
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1
Answer:
31
Step-by-step explanation:
a1 = 12
a7 = a11 - 24
a + 6d = a + 10d - 24
12 + 6d = 12 + 10d - 24
4d = 4
d = 1
therefore,
a20 = a + 19d = 12 + 19(1) = 31
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