Question

plz help me
what is root test?

Answer 1

Could you be more specific?

Answer 2

it is for series

Answer 3

it is one of the tests to find out whether the infinite series converges or not

Answer 4

well it goes like this.
Let sigma a_n be a series with a_n >=0 for n >=N(natural number).
For all positive number e, if there exist M(natural number) such that |(a_n)^(1/n)-r|<e for all n>M, and r<1 then the series converes.

Answer 5

if r>1 the series diveres
and if r=1 it is inconclusive.