exam Maths Puzzle Numerical Ability

Help me please!

Write the explicit for the sequence:

2,5,10,17,26

thank you

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exam Other Question

Hi. I need some help with the following problem.

Find f(a),f(a+h), and f(a+h)-f(a)/h where h does not equal 0.

f(x)=x^3 Find two consecutive integers such that the sum of 2 times the frist integer and 7 times second integer is 88