Question

If an AP the common difference is D and 7 term is 4 then find the first term of ap

Answer 1

According to ques,

D = 4  ;  a₇ = 4

Then,

a₇ = a + 6d                  

(because aₓ = a + (x-1)d)

4 = a + 6(4)

4 = a + 24

a = 4 - 24

a = -20.
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