Question

-5+(-8)+(-11)+...+(-230). find the solution of arithmetic progression step by step​

Answer 1

Given,

a=-5

d=-3

tn=-230

tn=a+(n-1)d

-230=-5+(n-1)×-3

-230=-5-3n+3

-230+5=3-3n

-225-3=-3n

-n=-228/3

n=76

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