For finding, the sum of last ten terms, we write the given AP in reverse order i.e, 126, 124, 122,..., 12, 10, 8
Hence,first term (a) = 126, common difference, (d) = 124 - 126
So,
Answer: option d.
Step-by-step explanation:
Based on the information given in the problem, you know that:
You also know that:
Substitute values. Then, you obtain:
Apply square root to both sides. Therefore, you obtain:
Ten times ten (10 x 10) is equal to 100