Question

9.
Find the value of K for which the equation x2 + Kx + 4 = 0 has real roots.

10.
Show that the sequence 9, 12, 15, 18..... is an A.P.. Find its 20th term

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Answer 1

Answer:

vas I explained may it helps you plzz follow me

K>4(1) and 20th term=66