Question Factor the expression 21(n−2) Evaluate 21n−1Solution 21(n−2) Show Solution Find the roots n=2 Evaluate 21n−1To find the roots of the expression,set the expression equal to 0 21n−1=0Move the constant to the right-hand side and change its sign 21n=0+1Removing 0 doesn't change the value,so remove it from the expression 21n=1Multiply by the reciprocal 21n×2=1×2Multiply n=1×2Solution n=2 Show Solution
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