Introducing your new favourite teacher - Teachoo Black, at only ₹83 per month
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Last updated at May 29, 2018 by Teachoo
Example 21 Are f and g both necessarily onto, if gof is onto? Let f : {1, 2, 3, 4} {1, 2, 3, 4} f is not onto g: {1, 2, 3, 4} {1, 2, 3} g is onto gof is onto. But g & f are not necessarily onto