Find the 10th Term in the Sequence 5n-3: Step-by-Step Solution

Question

5n3 5n-3

What is the value of the 10th element in the sequence above?

Video Solution

Solution Steps

00:00 Find the 10th term in the sequence
00:04 Substitute the corresponding term position in the sequence formula and solve
00:08 Substitute N = 10 in the sequence formula
00:20 Always solve multiplication and division before addition and subtraction
00:29 And this is the solution to the question

Step-by-Step Solution

To solve this problem, let's work through these steps:

  • Step 1: Identify the expression defining the sequence.
  • Step 2: Substitute n=10 n = 10 into the expression.
  • Step 3: Perform the arithmetic calculation.
  • Step 4: Verify if the resulting term corresponds to any given choices.

Now, let's proceed with each step:

Step 1: The sequence is defined by the expression an=5n3 a_n = 5n - 3 .

Step 2: To find the 10th element, substitute n=10 n = 10 into the expression:
a10=5(10)3 a_{10} = 5(10) - 3 .

Step 3: Carry out the calculation:
a10=503=47 a_{10} = 50 - 3 = 47 .

Step 4: Upon checking the possible answers, the calculated value a10=47 a_{10} = 47 matches option 47 47 .

Therefore, the value of the 10th element in the sequence is 47 47 .

Answer

47