Question
If 10x2 – 6xy+y² – 4x+4= 0, then find
the value of (3x+2y).Solution
10x2 – 6xy+y² – 4x+4= 0 x2 -4x+4+9x2+y2-6xy=0 (x-2)2+(3x-y)2=0 When- x-2=0 x=2 3x-y =0 y=6 Now – 3x+2y =3×2+2x6=18.
Which join should be used when you want to list all customers and any orders they may have placed, including customers who haven’t placed any orders?
Which of the following commands are used to put a restriction on the number of rows returned from a query?
What is context switching?
Which of the following operators is used to compare a value to a list of literal values that have been specified?
If every non-key attribute is functionally dependent on the primary key, the relation will be in
A relation is in 2NF if:
What is the maximum number of processes that can be in the Ready state?
During transaction before commit which of the following statements is done automatically in case of shutdown?
Which of the following illustrates an advantage of DBMS over traditional file systems?
The 'thrashing' in an operating system is related to:
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