Changes
From Karnataka Open Educational Resources
730 bytes added
, 06:39, 15 February 2014
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− | = Hints for difficult problems = | + | # = Hints for difficult problems = |
| Question : If x= and y= find | | Question : If x= and y= find |
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| Step 8 : = | | Step 8 : = |
| + | # =hints for dificult problem= |
| + | =====If x+y=a and xy=b then prove that (1+)+(1+) = |
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| + | Steps for solution |
| + | |
| + | step 1: * Understanding the problem first. |
| + | * Recalling the indentities |
| + | |
| + | step 2 : * consider the condition and squaring on both side |
| + | * simplify to get the value |
| + | |
| + | step 3: * consider LHS |
| + | * multiply the expression |
| + | * substitute the value |
| + | * simlpify the equqtion |
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| + | |
| + | solution for the problem |
| + | |
| + | consider x+y=a |
| + | = |
| + | substitute x+y =a and xy=b |
| + | then we get |
| + | ------->(1) |
| + | consider xy=b squaring on both side |
| + | then we get =------->(2) |
| + | |
| + | consider LHS= |
| + | =(1+)+(1+) |
| + | =1+ |
| + | = 1+ from eqn 1 & 2 |
| + | = |
| + | = |
| + | LHS = RHS============= |
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| = Project Ideas = | | = Project Ideas = |