a+b = 1 , a²+b² = 2 . so what will be a^7+b^7
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(a+b)^2=a^2+b^2+2ab
According to the question
a+b=3 and a^2+b^2=7
put these values in the question
(3)^2=7+2ab
9–7=2ab
2/2=ab
1=ab
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