Question

can anyone solve ques 9??

Answer 1

a = 20 d=77/4-20=3/4
a+(n-1)d <0
20+(n-1)3/4<0
20+3/4n-3/4<0
80-3/4<3/4n
77×4/4×3<n
25.9<n
26 term will be negative

Answer 2

   x=$\sqrt{6+ \sqrt{6+ \sqrt{6+....} } }$
x=$\sqrt{6+x}$
x²=6+x    ...........................................sqaure the both side
⇒x²-x-6=0
⇒x²-3x+2x-6=0
⇒x(x-3)+2(x-3)=0
⇒(x+2)(x-3)=0
x=-2  or 3 answer

I hope its help you.

Please mark as BRAINLEIST ANSWER.