Answer:
a = 2
Step-by-step explanation:
In an AP the difference between consecutive terms is common (equal), thus
t₂ - t₁ = t₃ - t₂ , that is
2a + 1 - (a + 1) = 4a - 1 - (2a + 1) ← distribute and simplify both sides
2a + 1 - a - 1 = 4a - 1 - 2a - 1
a = 2a - 2 ( subtract 2a from both sides )
- a = - 2 ( multiply both sides by - 1 )
Answer: 3 1/2 as a decimal is 3.5.
B
The pattern is to add 4 each time. So 17+4 is 21, 21+4 is 25, and 25+4 is 29
This is the answer. Always remember SOH CAH TOA
Had fun solving this ngl
