1.

The first negative term of the following AP will be993, 986, 979, 972,...​

Answer»

n = 143rd term.Explanation: A.P 993, 986, 979, 972,...a= 993 d= -7 LET FIRST negative term be −1−1 = a+(n−1)d⇒ −1 = 993+(n−1)−7⇒ -7(n-1) = -1-993⇒ n-1 = 994/7= n = 142+1= n = 143rd term.


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