Question

Find 15th term of 4,11,18

Answer 1

Step-by-step explanation:

Tn=a+(n-1)d

as the sequence is in AP

here, a=4

d=7

therefore

=4+(14)7

=112

Answer 2

$\sf Arithmetic \: Sequence = 4,11,18,....$

$\sf First \: term = 4$

$\sf Second \: term = 11$

$\rm\bf Common \: Difference = 11-4=7$

$\rm\underline{ n^{th} \: term = a+(n-1)d}\\\\\rm 15^{th} \: term = 4+ (15-1)7$

             $\rm = 4+14\times7$

             $\rm = 4+98$

             $\rm\bf = 102$

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