If x – y = 1 and x2 + y2 = 41 where x, y ≥ 0, then the value of x + y will be:
(x - y)² = x² - 2xy + y² x - y = 1 and x2 + y2 = 41 (x - y)² = x² - 2xy + y² 1 = 41 - 2xy xy = 20 now - (x + y)² = x² + 2xy + y² =41+2×20 (x + y)²=81 x+y =9.
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Only a few H are G.
Some G is not K.
All L is K.
Conclusions:
Some H can be K.
All L can never be G.
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Some tables are chairs.
No chair is a book.
Conclusions: I. Some racks are chairs. ...
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All bags are polythenes.
Some polythenes are points.
Only a few points are jutes.
No jute is pl...
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All ornaments are copper
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I. All p...
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Only a few summers are spring.
Some springs are autumn.
No autumn is season.
...
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All nuts are cashews.
No cashew is a fruit.
Conclusions: Some potatoes are cashews.
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All houses are windows.
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No plate is a glass.
Conclusions: I. Some glasses are cups.
II. No glass is a cup.
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Only a few microwaves are toasters
No oven is a grinder
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I...
Some tubes are rains. All flowers are tubes.
