In the following ap find the missing term
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a = ?
a + d = 13 , eq(1)
a + 2d = ?
a + 3d = 3 , eq(2)
eq(2) - eq(1) , we get :
2d = -10
d = -5
a - 5 = 13
a(1) = 18
a(3) = 18 + 2(-5) = 18-10 = 8
a + d = 13 , eq(1)
a + 2d = ?
a + 3d = 3 , eq(2)
eq(2) - eq(1) , we get :
2d = -10
d = -5
a - 5 = 13
a(1) = 18
a(3) = 18 + 2(-5) = 18-10 = 8
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