Question
The number of terms in the sequence 5, 20, 80,
320,……………., 5120 is:Solution
The given sequence is 5, 20, 80, 320, ………., 5120 We can see that, the given series is a geometric progression with common ratio 4. nth term of a geometric progression is given as: ar(n-1) Where, a = first term, r = common ratio ∴ 5 × 4(n-1) = 5120 ⇒ 4(n-1) = 5120/5 = 1024 ⇒ n – 1 = 5 ⇒ n = 6
Conversion of organic form of nitrogen into inorganic form is refer to as………………..
Which practice involves the mechanical manipulation of soil soon after harvest to preserve moisture and control weeds during fallow periods?
Which of the following has been used for inducing male sterility in Bajra ?
Soils with high pH are generally deficient in:
Nalidixic acid, an antibiotic is an inhibitor of:
India is known as the land of
The most widely grown species of rose for cut flower production under protected cultivation is:
Which of the following is INCORRECT?
Which of the following is propagated by stem cuttings and used extensively in bedding plant designs?
Topping is a practice done in:
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