How many numbers greater than thousand but not greater than four thousand can be formed
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3000.......
by using formula a+(n-1)d=tn
1001+(n-1)1=4000
1001+n-1=4000
n=4000-1000
=3000
by using formula a+(n-1)d=tn
1001+(n-1)1=4000
1001+n-1=4000
n=4000-1000
=3000
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