Q. 3y4y⋅yIf the given expression is equal to ya for all positive values of y, what is the value of a ?
Expressing terms with exponents: We need to express the given expression in terms of y with exponents to find the value of a. Let's start by expressing each term with exponents.
Simplifying the expression: The fourth root of y is y41, and the square root of y is y21. The cube root of y is y31. So the expression becomes (y41⋅y21)/y31.
Adding exponents: Using the properties of exponents, when we multiply terms with the same base, we add the exponents. So y41×y21 becomes y41+21.
Dividing terms with the same base: Adding the exponents 41 and 21, we get y(41+42) which simplifies to y43.
Finding a common denominator: Now we have y43 divided by y31. Using the properties of exponents, when we divide terms with the same base, we subtract the exponents. So y43/y31 becomes y43−31.
Subtracting exponents: To subtract the exponents, we need a common denominator. The common denominator of 4 and 3 is 12. So we convert 43 to 129 and 31 to 124.
Final simplification: Now we subtract the exponents: 129−124, which equals 125. So y43/y31 simplifies to y125.
Value of a: Therefore, the given expression 4y⋅y/3y simplifies to y125. This means that a=125.
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