In an Arithmetic Progression, if d= - 4, n=7,an=4, then find a.
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28
Step-by-step explanation:
an = 4
a + (n-1)d = 4
a + (7-1)(-4) = 4
a + 6×(-4) = 4
a + (-24) = 4
a = 4 + 24
a = 28
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