find the sumof first 19 term of the AP 2, 7, 12 ,17
Answers
Answered by
0
Answer:
893
Step-by-step explanation:
Here,
a=2 , d=5 and n=19
Using the formula,
Sn = n/2 [ 2a 3 ( n-1 ) ]
we get,
S19 = 19/2 [ 2*2+ (19-1) 5 ]
since, a = 2, d = 5 and n = 19
= 19/2 [ 4+90 ]
= 19*47
= 893
Hence, the sum of first 19 terms of the given AP is 893 .
plz follow me
I hope this may help you
Similar questions