Math, asked by balkarankumar, 1 year ago

Find the sum: -5+(-8)+(-11)+....+(-230)​

Answers

Answered by Anonymous
32

Step-by-step explanation:

a = -5 , d = -8 -(-5) = -8+5 = -3

An = a + (n-1)d

-230 = -5 + (n-1)-3

-225 = -3(n-1)

75 = n - 1

n = 76

N पदों का योग = n/2 {2a+(n-1)d}

= 76/2 {-10+(75)-3}

= 38 {-10 - 225}

= 38 * -235

= -8930

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