Q. (a−3a7)0⋅a7a3(a−2)4The given expression simplifies to ax, for some integer x. What is the value of x ?Choose 1 answer:(A) −12(B) 0(C) 2(D) 12
Step 1: Simplify the expression: First, let's simplify the expression step by step. We start with the first part of the expression: (a−3a7)0. Any number (except 0) raised to the power of 0 is 1. So this part of the expression simplifies to 1.
Step 2: Simplify the exponent in parentheses: Next, we look at the second part of the expression: (a3(a−2)4)/(a7). We can simplify the exponent in the parentheses first: (a−2)4=a−2∗4=a−8.
Step 3: Multiply numbers with the same base: Now we have a3×a−8 in the numerator. When we multiply numbers with the same base, we add the exponents: a3×a−8=a3+(−8)=a−5.
Step 4: Ignore the 1: We now have the expression 1×(a−5)/(a7). Since 1 multiplied by anything is itself, we can ignore the 1. So we are left with (a−5)/(a7).
Step 5: Divide numbers with the same base: When we divide numbers with the same base, we subtract the exponents: a−5/a7=a−5−7=a−12.
Step 6: Simplify the expression: The expression simplifies to a−12. Therefore, the value of x is −12, which corresponds to answer choice (A).
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