Class 11th. .... chp Mathematical Induction ...
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Let n be a positive numbers from the set of natural no.
Hence, it is also evident that 4*n is clearly divisible by 4.
We take an example as n=1 and n=2.
When n=1, we have in function value of n=1, then 7n-3n comes out to be 7-3=4. Which is clearly divisible by 4.
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