Question

find the second term of the proportion whose first is 3, third term is 21, fourth term is 105

Answer 1

Answer:

84

Step-by-step explanation:

We know that, d = a4 - a3

d = 105 - 21

d = 84

So, a2 = a + d

a2 = 3 + 84

a2 = 87

Therefore, the second term of the A.P is 84

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