solve this it is of 2 marks
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Given:-
a1=a
a2=b
an=2a
n=?
d=a2-a1
=b-a
by using formula,
=>an=a+(n-1)d
2a=a+(n-1)(b-a)
2a=a+bn-an-b+a
2a=2a+bn-an-b
2a-2a=bn-an-b
0=(b-a)n-b
b=(b-a)n
b/(b-a)=n
the term is=b/(b-a)
a1=a
a2=b
an=2a
n=?
d=a2-a1
=b-a
by using formula,
=>an=a+(n-1)d
2a=a+(n-1)(b-a)
2a=a+bn-an-b+a
2a=2a+bn-an-b
2a-2a=bn-an-b
0=(b-a)n-b
b=(b-a)n
b/(b-a)=n
the term is=b/(b-a)
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