Math, asked by divyavk05, 11 months ago

please help me with this sum.

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Answered by aayushg1713

1

a = -5

l =45

Sum = n(a+l)/2 = 120

240 = n( -5 + 45)

240 = n (40)

n = 6

l = a + (n - 1)d

45 = -5 + (5) d

d =10

divyavk05: thanks

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