An ap if the common difference d is equal to minus 4 and the 7 term is 7 is 4 find the first term
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we know that d= -4
and the 7th term is 4
so 7th term is a+6d=4 .... (1)
by substituting the value of d in (1)
we get ,
a+6(-4)=4
a+(-24)=4
a-24=4
a=4+24
a=28
and the 7th term is 4
so 7th term is a+6d=4 .... (1)
by substituting the value of d in (1)
we get ,
a+6(-4)=4
a+(-24)=4
a-24=4
a=4+24
a=28
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