in an A.p if d= -3, n=8 & An = 40 then value of A is
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In an A.p, if d= -3, n=8 & An = 40 then value of A is ?
d = (-3)
n = 8
An = 40
A.T.Q.
An = a+(n-1)d
40 = a+(8-1)(-3)
40 = a + (7)(-3)
40 = a - 21
a = 40+21
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