Question

find the first term of an AP ahere the fourth term is 27 and the common difference is 5

Answer 1

Answer:

a4 = 27

d = 5

a4 = a + 3d

27 = a + 3(5)

27 = a + 15

27-15 = a

a = 12

first term = 12

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Answer 2

a=12

Step-by-step explanation:

a4=27

i.e a+3d = 27

given that d=5

a+3(5) =27

a+15=27

✓a =12

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