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[" (iv) If "a=3,b|=4" ,then the value of...

[" (iv) If "a=3,b|=4" ,then the value of "lambda" for which "a+lambda b" is perpendicular to "a-lambda b],[" is "],[qquad [" (a) "(9)/(16)," (b) "(3)/(4)," (c) "(3)/(2)," (d) "(4)/(3)]]

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