Find the sum of first 30 terms of the A.P. : 1 + 5 + 9 + 13 + . . . . . .
Answers
Answered by
58
Answer:
1+5+9+13.. is an Arithmetic Progression
First term ==> a = 1
Common Difference ===> d = Second term - First term = 5-1 = 4
Formula for the sum of first n terms of an A.P =
n/2 [2a+(n-1)d]
We need the sum of first 30 terms:
30/2 [ 2 (1) + (30-1)(4)]
15 [2+ 29×4]
15 [2+ 116]
15 [118]
1770
Answered by
3
Answer:
1770
Step-by-step explanation:
1+5+9+13.. is an Arithmetic Progression
First term ==> a = 1
Common Difference ===> d = Second term - First term = 5-1 = 4
Formula for the sum of first n terms of an A.P =
n/2 [2a+(n-1)d]
We need the sum of first 30 terms:
30/2 [ 2 (1) + (30-1)(4)]
15 [2+ 29×4]
15 [2+ 116]
15 [118]
1770
Similar questions