Question

18. If the first term of an A.P is -5 and the common difference is 2, then find the sum of the first 6 terms.
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Answer 1

Answer:

sn=n/2{2a+(n-1)d}

a= -5,d=2 ,n=6,

6/2{-10+(5)*2}

3(-10+10)

=0

Answer 2

Answer:

HII..

Step-by-step explanation:

answer

IN AP:-

a =-5

d=2

formula= n/2(2a+(n-1)d)

put value of n

hence,

3(-10+10)=0

answer =0

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