Answer:
Step-by-step explanation:
Hey there
Your answer is here
A. P. - 7,14,21,_,_ so on
Sn= n/2(2a + (n-1)d)
S20 = 10 ( 40 + 19*7)
S20= 10* 173
S20 = 1730
Hope it will help you
Answer is 1470
We get it by applying the formula
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Answers & Comments
Answer:
Step-by-step explanation:
Hey there
Your answer is here
A. P. - 7,14,21,_,_ so on
Sn= n/2(2a + (n-1)d)
S20 = 10 ( 40 + 19*7)
S20= 10* 173
S20 = 1730
Hope it will help you
Answer is 1470
We get it by applying the formula