Question

Find the tenth term of the sequence √2, √8,√18, ………

Answer 1

√2,√8,√18

√8 can also be written as 2√2

and similarly, √18 can also be written as 3√2

so...

a=√2

d=2√2-√2=√2

a10=a+9d

=√2+9×√2

=10√2

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