Grade 12Algebra
Three numbers are in G.P their sum is 7 and sum of their squares in 21 find the numbers
Three numbers are in G.P their sum is 7 and sum of their squares in 21 find the numbers
2 Answers
Shona
b^2=ac-----(1)
a+b+c=7----(2)
a^2+b^2+c^2=21------(3)
solve the three equations
you will get
a=1 & a=4
b=2 & b=2
c=4 & c=1
Gavvala Ganesh
we know it was in g.p so,b^22=ac------eq(1)
Given that
a+b+c=7----(2)
a^2+b^2+c^2=21=---(3)
solve we get
a=1 and a=4
b = 2 and b = 2
c = 4 and c = 1.
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