In an ap if the d=-4and the seventh term is 4 then find the first term
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1
tn = a+(n-1)d
4=a+(7-1)-4
4=a + 6*-4
4=a -24
a= 24+4
a=28
4=a+(7-1)-4
4=a + 6*-4
4=a -24
a= 24+4
a=28
Answered by
2
Given,
Common differences = - 4 as a7th = 4
=> a + 6d = 4
=> a + 6×-4 = 4
=> a - 24 =4
=> a= 28 // Ans
Common differences = - 4 as a7th = 4
=> a + 6d = 4
=> a + 6×-4 = 4
=> a - 24 =4
=> a= 28 // Ans
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