Question

Which term of AP: 3,8,13,18,......78?​

Answer 1

Answer:

$\Large{\boxed{\underline{\overline{\mathfrak{\star \: QuEsTiOn :- \: \star}}}}}$

Which term of AP: 3,8,13,18,......78?

$\huge\underline{\overline{\mid{\bold{\pink{ANSWER-}}\mid}}}$

$\large\boxed{\star\:\:\:16^{th}\:term\:of\:the\:AP\:is\:78.\:\:\:\star}$

Step-by-step explanation:

☆ Given:-

 AP:- 3,8,13,18,...,78 , where a=3, d=5, aₙ=78.

☆ To Find:-

   nth term of AP(which term of AP is 78).

☆ Formula Applied:-

aₙ=a+(n-1)d

$\Large{\underline{\underline{\bf{SoLuTion:-}}}}$

    aₙ=a+(n-1)d , where aₙ=78, a=3, d=5.

⇒ 78=3+(n-1)(5)

⇒ 78-3=5n-5

⇒ 75+5=5n

⇒ 5n=80

$\implies\: n=\frac{80}{5}$

$\implies\:\boxed{n=16}$

Answer 2

Step-by-step explanation:

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