if the common difference is 2 and the 3rd term is 9 what is the first term
Answer (1)
Answer:5Step-by-step explanation:{ 5 , 7 , 9 }Formula: a3 = an + (n-1)(d) Solution:9 = a1 + (3-1)(2)9 = a1 + (2)(2)9 = a1 + 49 - 4 = a1a1 = 5
Answer:5Step-by-step explanation:{ 5 , 7 , 9 }Formula: a3 = an + (n-1)(d) Solution:9 = a1 + (3-1)(2)9 = a1 + (2)(2)9 = a1 + 49 - 4 = a1a1 = 5
