(ii) the
the 18th term of the AP V2, V18, V50, 198,
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a = √2
d= √18 - √2
= 3√2 - √2
= 2√2
n = 18
an = a + ( n - 1 ) d
= √2 + ( 18 - 1 ) x 2√2
= √2 + 17 x 2√2
= √2 + 34√2
= √2 ( 1 + 34 )
= 35√2
The 18th term of the A.P is 35√2
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