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The first and last term of a GP are -18 and -2/9 respectively. Find the number of terms in the G.P?

By Kinsley

The first and last term of a GP are -18 and -2/9 respectively. Find the number of terms in the G.P?

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Kinsley

If tanA = 30°, prove that
[tex] \tan2a = \frac{2 \tan a }{1 – { \tan}^{2} a} [/tex]
​

apply equaton (x+y)÷2

a) -10,-6
b)-4,2
c)8,-20​

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