alleryIf 4th term is 11 and 9th term is 26, first term is
A2
B5
C3
D1
Answer & Solution
Correct answer: A. 2
1. a + 3 d = 11 and a + 8 d = 26.
2. Subtract: 5 d = 15, so d = 3.
3. Substitute back: a + 9 = 11, so a = 2.
4. Hence the first term is 2.
_Source: Selina Concise Mathematics Class 10, Ch on Arithmetic Progression (Mistral OCR'd PDF), section on simultaneous equations_
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