What is the sum of the first 20 terms of an ap if a = 4 and t20 = 36 ?
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0
Answer:
Sum of the first 20 terms is 400.
Answered by
1
Answer:
400
Step-by-step explanation:
Here a ( n ) = a + ( n - 1 ) d = last term = a ( 20 ) Sum = 20/2 ( 4 + 36 ) = 10 ( 40 ) = 400. Sum of the first 20 terms is 400.
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