in an A.P if the common diffrence (d)=-4 and the seventh term (a7 ) is 4 , then find the first term
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Answered by
5
d=-4
nth term=a+(n-1)d
a7=a+(7-1)(-4)
4 =a-24
a=28
nth term=a+(n-1)d
a7=a+(7-1)(-4)
4 =a-24
a=28
Answered by
4
d=-4
a7=a + 6d
4 = a + 6×-4
4 = a - 24
a = 28
Thats an easy and short method which will provide you full marks according to the marking scheme
a7=a + 6d
4 = a + 6×-4
4 = a - 24
a = 28
Thats an easy and short method which will provide you full marks according to the marking scheme
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