the 6 term of a G.p is 2000 find its first term if its ratio is 10

T6 = ar^5 = a*10^5 = 2000
a = 2*10^3 / 10^5 = 2*20^-2 = 0.02

Check:

0.02 0.2 2 20 200 2000 ...

T6=ar^5=a*10^5=2000 a=2*10^3/10^5=2*20^-2=0.02 check:0.02 0.2 2 20 200 2000

Given that Un=ar*n-1.

0.02

THE 6TH TERM OF A GP IS 2000. FIND ITS FIRST TERM IF ITS COMMON RATIO IS 10

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0.02

T=ar^n-1
a×10^6-1
a×10^5=2000
a×100000=2000