Question

in an arithmetic sequence, 5t5 = 9t, then prove that t14 = 0

Answer 1

Answer:

I didn't understand this

Answer 2

Answer:

5(a+(5-1)d)=9(a+(9-1)d)

5a+20d=9a+72d

4a=-52d

a=-13d

a+13d=0

T14=a+(14-1)d

=a+13d

T=0 proved...