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If in an A.P. a,16.2, d - 3, a -7.2 then find n. |
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Answer» Answer: 16.2=-7.2+(n-1)-3 16.2+7.2=(n-1)-3 23.4=-3n+3 23.4-3=-3n 20.4/-3=n -6.8=n |
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