exam Maths Puzzle Numerical Ability

Use the Intermediate Value Theorem to determine if P(x)=2x^5-7x+1 has a zero in the interval [1,2].

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exam Other Question

please help me solve this equation: (c-5/4=3) Can you help me solve this problem?

Add.
(3r^4-2r^3+2r^2+10r-4)+(r^5+9r^3+5r^2-2r-2)+(-6r^4+r^2-6r-9)

I would really appreciate an explanation on how to solve this problem. Thank you so much for your help once again.