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Grade 11Algebra

If (1+ x - 2x^2)^6 = 1+ a1x + a2x^2 +.........+ a(12)x^12, then prove that a2+a4+a6+........+a12 = 31.

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Profile image of Swap Bho
13 Years agoGrade 11
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2 Answers

Profile image of Aravind Kashyap
ApprovedApproved Tutor Answer13 Years ago

TRY THIS...FIRST KEEP X= THEN X= OMEGA AND THEN X= OMEGA SQUARE. AND ADD ALL THE THREE EQUATIONS....U WILL GET TAHT RESULT...HOPE U GOT MY POINT..THANKU

Profile image of orange panda
13 Years ago

put x=1,-1,0 and then add them.