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# Need help. again -_- Watch

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1. Im sure my teacher aint taught me everything for exam in January, thank god for this site.
I have worked out part a) which is: Write down the first four terms in the expansion of (1+ x/2)^5 in ascending power of x. I got 1 + 10x + 40x^2 + 80x^3.
So how do i do the second part? Question: By subsituting an appropiate value for x in a), find the appropiate value for 1.05^5. Show all working and give you answer correct to three decimal places.
2. You definitely got a) wrong.
3. For these kinds of questions, you should put equal to . So . Solve for x and substitute what you get into your answer to part a, and then add it up to get your answer.

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Updated: December 17, 2010
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