Question

Find the sum of A.P.
-37 , -33 , -29 …………. to 12 terms

Answer 1

Step-by-step explanation:

-25 ,

-21

-17

-13

-9

-5

-1

3

7

11

15

19

.............

Answer 2

Answer:

-180

Step-by-step explanation:

a=-37 d=-33-37=4 n=12

sn=n/2 [2a + (n-1) d]

sn= 12/2 [2 ( -37) + (12-1) 4]

sn= 6 [-74 + 11(4) ]

sn= 6[ -74+44]

sn= 6[-3 ]

sn= -180

:- the sum of first 12 terms of of given AP is - 180

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