The 7th and 21st terms of an AP are 6 and -22 respectively. Find the 26th term
A. -34 B. -32 C. -12 D. -10 Answer: Option BShow Answer
Solution(By Apex Team)
7th term = 6
21st term = -22
That means, 14 times common difference or -28 is added to 6 to get -22
Thus, d = -2
7st term = 6 = a + 6d
Or, a + (6 × -2) = 6
Or, a = 18
26st term = a + 25d
= 18 -25 × 2 = -32
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