This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Here's how to find the 4th term of the summation: Step 1: Identify the starting value of the index and the expression for each term. The summation is _r=3^6 (2r+3). The index r starts at 3. The expression for each term is 2r+3. Step 2: Determine the value of r that corresponds to the 4th term. The terms are generated by incrementing r from its starting value. • The 1st term occurs when r=3. • The 2nd term occurs when r=4. • The 3rd term occurs when r=5. • The 4th term occurs when r=6. Step 3: Substitute the value of r for the 4th term into the expression. For the 4th term, r=6. 2r+3 = 2(6) + 3 = 12 + 3 = 15 The 4th term is 15. Last free one today — make it count tomorrow, or type /upgrade for unlimited.