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March 1, 2015

Posted by **Watermelon** on Thursday, December 29, 2011 at 12:56am.

a)his annual salary, to the nearest RM, for the year 2007.

b)the minimum value of n such that his annual salary in the nth year will exceed RM36,000.

c)the total salary, to the nearest RM, paid to him by the company, for the years 2002 to 2007.

- GP Calculus -
**Steve**, Thursday, December 29, 2011 at 5:03ama) 18000 * 1.05^5

b) 36000 = 18000 * 1.05^n

n = ln 2/ln 1.05

c) sum of first n terms of a GP is

a(1-r^n)/(1-r) = 18000(1-1.05^6)/(1-1.05)

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