English, asked by Ankitannusingh1230, 2 months ago

which term of qn ap 7,13,19,,,205 is 115​

Answers

Answered by sujalmourya0532
3

Answer:

= a+(n-1)d

=7+(115-1)6

=7+(144×6)

=7+864

=871

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make sure

Attachments:
Answered by Anonymous
14

{\tt{\purple{\underline{\underline{\huge{Question}}}}}} \\ which  \: term  \: of  \: an \:  ap \: 7,13,19,,,205 \\  is \:  115

{\tt{\pink{\underline{\underline{\huge{Solution  }}}}}}

\mathbb\purple{GIVEN}

  • AP:7,13,19---205

From the question we can say;

  • A=7
  • D=A2- A1 =13-7=6
  • An=115

\mathbb\pink{FIND}

  • 115 is which term,ie,N

By the formula:

 \fbox \red{ an = a + (n - 1)(d)}

Putting values;

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  ⇝115 = 7 + (n - 1)(6) \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ⇝ 115 - 7 = (n - 1)(6) \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ⇝ 108 = 6n - 1 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  ⇝ 108 +6 = 6n \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  ⇝ 114 = 6n \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    \:  \:  \:  \:  \:  \:  \: ⇝ \frac{114}{6}  = n\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   ≫≫19 = n \\  \\

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