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$Consider an A.P a_{1}, a_{2}, a_{3}, \dots \dots . . such that a_{3} + a_{5} + a_{8} = 11 and a_{4} + a_{2} = - 2, then$
$the value of a_{1} + a_{6} + a_{7}, is$

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Correct option is C

Given that a3+a5+a8=11⇒a+2d+a+4d+a+7d=11⇒3a+13d=11 Given a4+a2=−2⇒a+3d+a+d=−2⇒a=−1−2dPutting value of ‘a’ from (2) in (1), we get3(−1−2d)+13d=11⇒7d=14⇒d=2 and a=−5⇒a1+a6+a7=7

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Consider an A.P a1,a2,a3,…….. such that a3+a5+a8=11 and a4+a2=−2, then the value of a1+a6+a7, is

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Ready to Test Your Skills?

free study material

$Consider an A.P a_{1}, a_{2}, a_{3}, \dots \dots . . such that a_{3} + a_{5} + a_{8} = 11 and a_{4} + a_{2} = - 2, then$
$the value of a_{1} + a_{6} + a_{7}, is$