The first four terms of an arithmetic sequence are given by a1= 6, a2 = 12,
1 answer:
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The given question can be solve using quadratic formula.
The correct option is (c) .
Given:
The given equation is,
---------------------------(1)
Write the general quadratic equation.
Write the quadratic formula.
------------------------------- (2)
Compare equation (1) and (2).
Substitute the value of ,
and
in general quadratic.
Subtract from each side of above equation.
Thus, the correct option is (c) .
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