Question

Find the sum of the sequence. 42+43+44+45+...+107

Answer 1

Answer:

4917

Step-by-step explanation:

Given sequence:

• 42, 43, 44, 45, ..., 107

This is AP with common difference of 1, the first term of 42 and the last term of 107

Number of terms:

• 107 - 42 + 1 = 66

Sum of the terms:

• Sₙ= 1/2*n*(a₁+aₙ)

• Sₙ= 1/2*66*(42+107) =  4917

Answer is: 4917