Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

{[f(1)=-62],[f(n)=f(n-1)+5]:}
Find an explicit formula for 
f(n).

f(n)=

{f(1)=62f(n)=f(n1)+5 \left\{\begin{array}{l} f(1)=-62 \\ f(n)=f(n-1)+5 \end{array}\right. \newlineFind an explicit formula for f(n) f(n) .\newlinef(n)= f(n)=

Full solution

Q. {f(1)=62f(n)=f(n1)+5 \left\{\begin{array}{l} f(1)=-62 \\ f(n)=f(n-1)+5 \end{array}\right. \newlineFind an explicit formula for f(n) f(n) .\newlinef(n)= f(n)=
  1. Identify sequence type: Identify the type of sequence described by the function f(n)f(n).\newlineSince f(n)f(n) is defined in terms of the previous term f(n1)f(n-1) plus a constant, this indicates that the sequence is arithmetic.
  2. Determine first term and common difference: Determine the first term and the common difference of the sequence.\newlineThe first term is given as f(1)=62f(1) = -62. The common difference is the amount added to each term to get the next term, which is 55.
  3. Use explicit formula for arithmetic sequence: Use the explicit formula for an arithmetic sequence to express f(n)f(n).\newlineThe explicit formula for an arithmetic sequence is an=a1+(n1)da_n = a_1 + (n-1)d, where a1a_1 is the first term and dd is the common difference.
  4. Substitute values into formula: Substitute the values of a1a_1 and dd into the formula.\newlineSubstituting the given values, we get f(n)=62+(n1)×5f(n) = -62 + (n-1)\times 5.
  5. Simplify expression: Simplify the expression.\newlineSimplifying the expression, we get f(n)=62+5n5f(n) = -62 + 5n - 5, which further simplifies to f(n)=5n67f(n) = 5n - 67.

More problems from Write a formula for an arithmetic sequence