1.

If an A.P , if d= -4 ,n=7,l=4,then ais

Answer»

d = -4
N=7
L = 4
We know that ,
An or l = a + ( n - 1 ) × d
4 = a + ( 7-1) × -4
4÷-4 = a + 6
-1 = a + 6
-1 -6 = a
-7 = a
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