Q. 303.7( 3 Votes )

The 7th term of an AP is 4 and its common difference is - 4. What is its first term?
A. 16

B. 20

C. 24

D. 28

Answer :

Given: a7 = 4

Common difference = d = - 4

To find: First term = a

Since, a7 = 4

a + 6d = 4

a + 6(-4) = 4

a = 4 + 24

a = 28

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