Question

In an AP if the common difference (d)=-16 and the seventh term (a7) is 4 then find the first term.​

Answer 1

Step-by-step explanation:

Given-

d = -16

(a7 = 4

We know that nth term of AP is

=> an = a + (n - 1)d

=> a7 = a + (7 - 1)d [n=7]

=> 4 = a + 6(d)

=> 4 = a + 6(-16)

=> 4 = a + (-96)

=> 4 = a - 96

=> a = 4 + 96

=> a = 100

Hence-

First term of AP is 100.

Answer 2

Answer:

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