Question

find tn for the A.P. 3,8,13,18 ​

Answer 1

Answer:

$\displaystyle \sf \green{a = 3 }$

$\displaystyle \sf \green{d = 8 - 3 = 5}$

$\displaystyle \sf \green{ \because \: t_{n} = a + (n - 1)d}$

$\displaystyle \sf \green{t _{n}= 3 + (n - 1)5}$

$\displaystyle \sf \green{t _{n}=3 + 5n - 5 }$

$\boxed{ \displaystyle \sf \blue{t_{n} = 5n - 2}}$

Answer 2

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