Question

In an AP 10th term is 63 and common difference is -3. Find the first term of AP

Answer 1

According to the question we get the following information

d = -3

a = ?

l = 63

n = 10

using the formula

l = a +(n-1)d

63 = a + (10-1) -3

63 = a - 27

63 + 27 = a

a = 90

So the first term is 90

Answer 2

Step-by-step explanation..............................