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Let r be the result of doubling both the...

Let `r` be the result of doubling both the base and the exponent of `a^b ,\ b!=0`. If `r` equals the product of `a^b\ by\ x^b,` then `x` equals a. `2` b. `4` c. `2a` d. `4a`

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  4. If 3^(2x-y)=3^(x+y)=sqrt27 , the value of y is a. 1/2 b. 3/4 c. 1/4 d....

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  5. If 3^x=5^y=45^z , then a. 2/z=1/y-1/x b. 2/y=1/x-1/z c. 2/x=1/z-1/y d....

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