5+7+9+...+75
How to do this Arithmetic Series???
Answers
Answered by
0
Answer:
96
Step-by-step explanation:
5+7=21
21+75=96
Answered by
0
Answer:
1440
Step-by-step explanation:
Here a = 5 , l= 75 and d = 7-5 = 2
formula : l= a + (n-1) d
so 75 = 5 + (n-1)2
75= 5+2n-2
75=2n+3
2n=75-3=72
n=72/2=36
formula : S= n/2 (a + l )
=36/2 (5+75)
=18×80
=1440
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