Question

Find the sum of A.P. : -26,-24,-22.....to 36 terms

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

sum of terms formula:-Sn=n/2[2a+[n-1)d]

so,here the first term is -26 and the common difference [d]=+2

so the 36th term is a36=a+35{d}=-26+70=44

so,we got the 36th term .Now do the sum of all 36 terms.

step1):-S36=36/2{2[-26]+[36-1]2}

step2):-18{-46+70}

step3):-18{24}

step4):- Sn=432

SO,HENCE THE SUM OF ALL 36 TERMS IS  432.

HOPE IT WILL HELP YOU.

ANSWER IS 432