Question

ii] Find the first term, If d=-2 and t = -25​

Answer 1

Find the first term, If d=-2 and t = -25

Answer 2

Step-by-step explanation:

Given d = -2 and tn = -25

We know that, tn = a + (n-1)d

or, -25 = a + (n-1)(-2)

or, -25 = a + 2 -2n

or, a = 2n - 2 - 25

or, a = 2n - 27

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