exam Maths Puzzle Numerical Ability

I am to prove the following using PMI (the prinicple of mathematical induction)
Notation: ^ means exponent.

Let x be any real number in the interval (0,1). Prove that for any

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exam Other Question

I am really stuck on this one, can someone help????

These data represent the population of a certain city.Year

Population (in thousands)
1950 18
1960 23
1970 29
1980
1.m(7-2m)=6
2.1/x=x-2/24
3.4/x+10=4/x-1
4.x+3/x=x-4/3
5.40/x-20/x-3=8/7